/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:19:39,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:19:39,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:19:39,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:19:39,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:19:39,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:19:39,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:19:39,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:19:39,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:19:39,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:19:39,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:19:39,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:19:39,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:19:39,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:19:39,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:19:39,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:19:39,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:19:39,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:19:39,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:19:39,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:19:39,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:19:39,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:19:39,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:19:39,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:19:39,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:19:39,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:19:39,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:19:39,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:19:39,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:19:39,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:19:39,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:19:39,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:19:39,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:19:39,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:19:39,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:19:39,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:19:39,275 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 03:19:39,301 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:19:39,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:19:39,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:19:39,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:19:39,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:19:39,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:19:39,303 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:19:39,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:19:39,303 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:19:39,304 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:19:39,304 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:19:39,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:19:39,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:19:39,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:19:39,305 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:19:39,305 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:19:39,305 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:19:39,305 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:19:39,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:19:39,306 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:19:39,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:19:39,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:19:39,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:19:39,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:19:39,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:19:39,308 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:19:39,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:19:39,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:19:39,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:19:39,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:19:39,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:19:39,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:19:39,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:19:39,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:19:39,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:19:39,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:19:39,530 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:19:39,531 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:19:39,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label01.c [2023-04-01 03:19:40,741 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:19:41,042 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:19:41,043 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label01.c [2023-04-01 03:19:41,064 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb932458/40aa238ddf234186a04d598c1341e2ff/FLAG297c91feb [2023-04-01 03:19:41,079 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb932458/40aa238ddf234186a04d598c1341e2ff [2023-04-01 03:19:41,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:19:41,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:19:41,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:19:41,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:19:41,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:19:41,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b3dd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41, skipping insertion in model container [2023-04-01 03:19:41,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:19:41,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:19:41,572 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label01.c[59340,59353] [2023-04-01 03:19:41,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:19:41,613 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:19:41,803 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label01.c[59340,59353] [2023-04-01 03:19:41,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:19:41,835 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:19:41,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41 WrapperNode [2023-04-01 03:19:41,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:19:41,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:19:41,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:19:41,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:19:41,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:19:41,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:19:41,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:19:41,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:19:41,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (1/1) ... [2023-04-01 03:19:41,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:19:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:19:41,996 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 03:19:42,002 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 03:19:42,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:19:42,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:19:42,027 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:19:42,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:19:42,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:19:42,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:19:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:19:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:19:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:19:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:19:42,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:19:42,114 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:19:42,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:19:43,369 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:19:43,629 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:19:43,630 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:19:43,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:19:43 BoogieIcfgContainer [2023-04-01 03:19:43,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:19:43,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:19:43,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:19:43,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:19:43,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:19:41" (1/3) ... [2023-04-01 03:19:43,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb1303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:19:43, skipping insertion in model container [2023-04-01 03:19:43,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:19:41" (2/3) ... [2023-04-01 03:19:43,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb1303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:19:43, skipping insertion in model container [2023-04-01 03:19:43,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:19:43" (3/3) ... [2023-04-01 03:19:43,639 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01.c [2023-04-01 03:19:43,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:19:43,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:19:43,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:19:43,691 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;@3f5d5043, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:19:43,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:19:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:19:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:19:43,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:43,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:19:43,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:43,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash 597540342, now seen corresponding path program 1 times [2023-04-01 03:19:43,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:43,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846892968] [2023-04-01 03:19:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:43,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:44,677 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 03:19:44,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:44,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846892968] [2023-04-01 03:19:44,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846892968] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:44,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:44,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:19:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508793995] [2023-04-01 03:19:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:19:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:19:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:19:44,725 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:19:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:45,453 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:19:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:19:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-01 03:19:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:45,473 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:19:45,473 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:19:45,477 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 03:19:45,481 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:45,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 70 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:19:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:19:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:19:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.7747440273037542) internal successors, (520), 293 states have internal predecessors, (520), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:19:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 529 transitions. [2023-04-01 03:19:45,551 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 529 transitions. Word has length 149 [2023-04-01 03:19:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:45,554 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 529 transitions. [2023-04-01 03:19:45,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:19:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 529 transitions. [2023-04-01 03:19:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 03:19:45,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:45,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:19:45,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:19:45,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:45,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash -848542251, now seen corresponding path program 1 times [2023-04-01 03:19:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:45,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606906487] [2023-04-01 03:19:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:46,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:46,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606906487] [2023-04-01 03:19:46,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606906487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:46,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:46,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:19:46,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210287057] [2023-04-01 03:19:46,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:19:46,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:19:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:19:46,026 INFO L87 Difference]: Start difference. First operand 301 states and 529 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:19:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:46,757 INFO L93 Difference]: Finished difference Result 917 states and 1632 transitions. [2023-04-01 03:19:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:19:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 161 [2023-04-01 03:19:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:46,762 INFO L225 Difference]: With dead ends: 917 [2023-04-01 03:19:46,762 INFO L226 Difference]: Without dead ends: 621 [2023-04-01 03:19:46,764 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 03:19:46,768 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 492 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:46,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 48 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:19:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-04-01 03:19:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2023-04-01 03:19:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 589 states have (on average 1.7215619694397284) internal successors, (1014), 595 states have internal predecessors, (1014), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-04-01 03:19:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1046 transitions. [2023-04-01 03:19:46,809 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1046 transitions. Word has length 161 [2023-04-01 03:19:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:46,813 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 1046 transitions. [2023-04-01 03:19:46,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:19:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1046 transitions. [2023-04-01 03:19:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 03:19:46,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:46,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:19:46,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:19:46,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:46,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1298785164, now seen corresponding path program 1 times [2023-04-01 03:19:46,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:46,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11790656] [2023-04-01 03:19:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:46,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:47,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:47,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11790656] [2023-04-01 03:19:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11790656] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:19:47,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:19:47,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:19:47,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264319195] [2023-04-01 03:19:47,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:19:47,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:19:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:19:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:19:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:19:47,379 INFO L87 Difference]: Start difference. First operand 607 states and 1046 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:19:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:19:48,061 INFO L93 Difference]: Finished difference Result 1881 states and 3380 transitions. [2023-04-01 03:19:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:19:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 176 [2023-04-01 03:19:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:19:48,068 INFO L225 Difference]: With dead ends: 1881 [2023-04-01 03:19:48,069 INFO L226 Difference]: Without dead ends: 1279 [2023-04-01 03:19:48,071 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 03:19:48,072 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 478 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:19:48,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 39 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:19:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2023-04-01 03:19:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1255. [2023-04-01 03:19:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1199 states have (on average 1.4962468723936613) internal successors, (1794), 1235 states have internal predecessors, (1794), 10 states have call successors, (10), 10 states have call predecessors, (10), 45 states have return successors, (147), 9 states have call predecessors, (147), 9 states have call successors, (147) [2023-04-01 03:19:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1951 transitions. [2023-04-01 03:19:48,116 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1951 transitions. Word has length 176 [2023-04-01 03:19:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:19:48,116 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1951 transitions. [2023-04-01 03:19:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:19:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1951 transitions. [2023-04-01 03:19:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 03:19:48,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:19:48,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:19:48,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:19:48,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:19:48,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:19:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1395152982, now seen corresponding path program 1 times [2023-04-01 03:19:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:19:48,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408822814] [2023-04-01 03:19:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:19:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:48,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:19:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408822814] [2023-04-01 03:19:48,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408822814] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:19:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236845471] [2023-04-01 03:19:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:19:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:19:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:19:48,612 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 03:19:48,613 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 03:19:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:19:48,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:19:48,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:19:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:48,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:19:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:19:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236845471] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:19:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [394415445] [2023-04-01 03:19:49,038 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:19:49,039 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:19:49,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:19:49,049 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:19:49,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:19:49,784 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:19:59,595 WARN L223 SmtUtils]: Spent 8.72s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)