/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/Problem17_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:24:36,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:24:36,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:24:36,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:24:36,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:24:36,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:24:36,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:24:36,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:24:36,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:24:36,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:24:36,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:24:36,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:24:36,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:24:36,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:24:36,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:24:36,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:24:36,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:24:36,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:24:36,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:24:36,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:24:36,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:24:36,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:24:36,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:24:36,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:24:36,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:24:36,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:24:36,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:24:36,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:24:36,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:24:36,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:24:36,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:24:36,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:24:36,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:24:36,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:24:36,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:24:36,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:24:36,920 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 04:24:36,953 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:24:36,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:24:36,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:24:36,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:24:36,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:24:36,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:24:36,955 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:24:36,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:24:36,955 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:24:36,955 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:24:36,955 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:24:36,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:24:36,956 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:24:36,956 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:24:36,956 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:24:36,956 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:24:36,956 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:24:36,956 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:24:36,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:24:36,957 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:24:36,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:24:36,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:24:36,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:24:36,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:24:36,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:24:36,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:24:36,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:24:36,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:24:36,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:24:36,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:24:36,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:24:36,959 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:24:36,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:24:36,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:24:36,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:24:36,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:24:37,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:24:37,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:24:37,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:24:37,201 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:24:37,201 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:24:37,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label53.c [2023-04-01 04:24:38,411 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:24:38,807 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:24:38,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label53.c [2023-04-01 04:24:38,831 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216e8a22c/3f2e7a15a93b410c8d75bdb1280065c8/FLAG27a5c5159 [2023-04-01 04:24:38,847 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216e8a22c/3f2e7a15a93b410c8d75bdb1280065c8 [2023-04-01 04:24:38,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:24:38,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:24:38,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:24:38,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:24:38,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:24:38,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:24:38" (1/1) ... [2023-04-01 04:24:38,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e408925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:38, skipping insertion in model container [2023-04-01 04:24:38,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:24:38" (1/1) ... [2023-04-01 04:24:38,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:24:38,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:24:39,123 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/Problem17_label53.c[2227,2240] [2023-04-01 04:24:39,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:24:39,723 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:24:39,751 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/Problem17_label53.c[2227,2240] [2023-04-01 04:24:39,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:24:39,997 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:24:39,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39 WrapperNode [2023-04-01 04:24:39,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:24:39,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:24:39,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:24:39,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:24:40,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:24:40,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:24:40,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:24:40,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:24:40,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (1/1) ... [2023-04-01 04:24:40,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:24:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:24:40,251 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 04:24:40,274 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 04:24:40,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:24:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:24:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:24:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:24:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:24:40,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:24:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:24:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:24:40,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:24:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:24:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:24:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:24:40,387 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:24:40,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:24:43,641 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:24:53,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:24:53,506 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:24:53,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:24:53 BoogieIcfgContainer [2023-04-01 04:24:53,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:24:53,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:24:53,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:24:53,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:24:53,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:24:38" (1/3) ... [2023-04-01 04:24:53,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7695c945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:24:53, skipping insertion in model container [2023-04-01 04:24:53,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:24:39" (2/3) ... [2023-04-01 04:24:53,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7695c945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:24:53, skipping insertion in model container [2023-04-01 04:24:53,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:24:53" (3/3) ... [2023-04-01 04:24:53,517 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label53.c [2023-04-01 04:24:53,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:24:53,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:24:53,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:24:53,591 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;@524cec56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:24:53,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:24:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:24:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:24:53,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:24:53,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:24:53,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:24:53,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:24:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2084383004, now seen corresponding path program 1 times [2023-04-01 04:24:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:24:53,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407345768] [2023-04-01 04:24:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:24:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:24:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:24:53,979 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 04:24:53,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:24:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407345768] [2023-04-01 04:24:53,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407345768] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:24:53,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:24:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:24:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417844717] [2023-04-01 04:24:53,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:24:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:24:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:24:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:24:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:24:54,026 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:24:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:24:55,711 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:24:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:24:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:24:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:24:55,727 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:24:55,727 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:24:55,733 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 04:24:55,737 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:24:55,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 85 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:24:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:24:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 466. [2023-04-01 04:24:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 456 states have (on average 1.8421052631578947) internal successors, (840), 456 states have internal predecessors, (840), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:24:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 851 transitions. [2023-04-01 04:24:55,798 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 851 transitions. Word has length 11 [2023-04-01 04:24:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:24:55,798 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 851 transitions. [2023-04-01 04:24:55,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:24:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 851 transitions. [2023-04-01 04:24:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:24:55,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:24:55,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:24:55,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:24:55,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:24:55,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:24:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -143515470, now seen corresponding path program 1 times [2023-04-01 04:24:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:24:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27607699] [2023-04-01 04:24:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:24:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:24:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:24:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:24:55,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:24:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27607699] [2023-04-01 04:24:55,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27607699] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:24:55,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:24:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:24:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600200182] [2023-04-01 04:24:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:24:55,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:24:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:24:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:24:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:24:55,974 INFO L87 Difference]: Start difference. First operand 466 states and 851 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:24:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:24:57,914 INFO L93 Difference]: Finished difference Result 1404 states and 2591 transitions. [2023-04-01 04:24:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:24:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:24:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:24:57,924 INFO L225 Difference]: With dead ends: 1404 [2023-04-01 04:24:57,925 INFO L226 Difference]: Without dead ends: 943 [2023-04-01 04:24:57,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:24:57,928 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 733 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:24:57,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 49 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 04:24:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-04-01 04:24:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 914. [2023-04-01 04:24:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 896 states have (on average 1.5524553571428572) internal successors, (1391), 900 states have internal predecessors, (1391), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-01 04:24:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1422 transitions. [2023-04-01 04:24:57,985 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1422 transitions. Word has length 21 [2023-04-01 04:24:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:24:57,986 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1422 transitions. [2023-04-01 04:24:57,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 04:24:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1422 transitions. [2023-04-01 04:24:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:24:57,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:24:57,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:24:57,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:24:57,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:24:57,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:24:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash 639221598, now seen corresponding path program 1 times [2023-04-01 04:24:57,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:24:57,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628218480] [2023-04-01 04:24:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:24:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:24:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:24:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:24:58,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:24:58,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628218480] [2023-04-01 04:24:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628218480] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:24:58,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:24:58,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:24:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223127621] [2023-04-01 04:24:58,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:24:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:24:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:24:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:24:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:24:58,136 INFO L87 Difference]: Start difference. First operand 914 states and 1422 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:25:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:25:00,329 INFO L93 Difference]: Finished difference Result 2783 states and 4387 transitions. [2023-04-01 04:25:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:25:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 04:25:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:25:00,343 INFO L225 Difference]: With dead ends: 2783 [2023-04-01 04:25:00,344 INFO L226 Difference]: Without dead ends: 1874 [2023-04-01 04:25:00,351 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 04:25:00,354 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 716 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:25:00,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 55 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:25:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2023-04-01 04:25:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1201. [2023-04-01 04:25:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1163 states have (on average 1.4299226139294927) internal successors, (1663), 1181 states have internal predecessors, (1663), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (70), 9 states have call predecessors, (70), 9 states have call successors, (70) [2023-04-01 04:25:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1743 transitions. [2023-04-01 04:25:00,419 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1743 transitions. Word has length 31 [2023-04-01 04:25:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:25:00,419 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1743 transitions. [2023-04-01 04:25:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:25:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1743 transitions. [2023-04-01 04:25:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 04:25:00,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:25:00,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:25:00,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:25:00,422 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:25:00,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:25:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash 348760092, now seen corresponding path program 1 times [2023-04-01 04:25:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:25:00,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77565633] [2023-04-01 04:25:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:25:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:25:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:25:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:25:00,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:25:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77565633] [2023-04-01 04:25:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77565633] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:25:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460579276] [2023-04-01 04:25:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:25:00,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:25:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:25:00,629 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 04:25:00,656 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 04:25:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:25:00,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:25:00,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:25:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:25:00,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:25:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:25:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460579276] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:25:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898617940] [2023-04-01 04:25:01,002 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 04:25:01,002 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:25:01,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:25:01,009 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:25:01,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:25:01,226 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-04-01 04:25:01,386 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 04:25:10,646 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53