/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:15:30,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:15:30,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:15:30,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:15:30,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:15:30,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:15:30,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:15:30,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:15:30,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:15:30,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:15:30,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:15:30,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:15:30,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:15:30,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:15:30,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:15:30,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:15:30,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:15:30,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:15:30,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:15:30,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:15:30,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:15:30,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:15:30,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:15:30,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:15:30,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:15:30,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:15:30,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:15:30,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:15:30,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:15:30,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:15:30,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:15:30,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:15:30,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:15:30,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:15:30,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:15:30,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:15:30,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:15:30,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:15:30,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:15:30,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:15:30,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:15:30,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:15:30,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:15:30,200 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:15:30,200 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:15:30,201 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:15:30,201 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:15:30,201 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:15:30,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:15:30,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:15:30,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:15:30,202 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:15:30,202 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:15:30,202 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:15:30,202 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:15:30,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:15:30,203 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:15:30,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:15:30,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:15:30,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:15:30,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:15:30,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:15:30,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:15:30,204 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:15:30,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:15:30,204 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:15:30,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:15:30,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:15:30,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:15:30,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:15:30,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:15:30,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:15:30,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:15:30,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:15:30,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:15:30,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:15:30,458 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:15:30,459 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:15:30,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label09.c [2023-03-31 22:15:31,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:15:31,909 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:15:31,910 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label09.c [2023-03-31 22:15:31,930 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f71cf17/4fb58245f6ef4336a2caca69483071ed/FLAG756631a89 [2023-03-31 22:15:31,947 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f71cf17/4fb58245f6ef4336a2caca69483071ed [2023-03-31 22:15:31,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:15:31,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:15:31,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:15:31,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:15:31,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:15:31,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:15:31" (1/1) ... [2023-03-31 22:15:31,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1834d0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:31, skipping insertion in model container [2023-03-31 22:15:31,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:15:31" (1/1) ... [2023-03-31 22:15:31,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:15:32,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:15:32,234 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label09.c[5013,5026] [2023-03-31 22:15:32,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:15:32,563 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:15:32,585 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label09.c[5013,5026] [2023-03-31 22:15:32,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:15:32,778 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:15:32,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32 WrapperNode [2023-03-31 22:15:32,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:15:32,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:15:32,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:15:32,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:15:32,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,903 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:15:32,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:15:32,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:15:32,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:15:32,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (1/1) ... [2023-03-31 22:15:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:15:32,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:15:32,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:15:32,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:15:32,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:15:32,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:15:32,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:15:32,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:15:32,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:15:32,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:15:32,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:15:32,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:15:32,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:15:32,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:15:33,086 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:15:33,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:15:34,882 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:15:35,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:15:35,832 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:15:35,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:15:35 BoogieIcfgContainer [2023-03-31 22:15:35,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:15:35,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:15:35,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:15:35,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:15:35,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:15:31" (1/3) ... [2023-03-31 22:15:35,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4cb738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:15:35, skipping insertion in model container [2023-03-31 22:15:35,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:32" (2/3) ... [2023-03-31 22:15:35,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4cb738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:15:35, skipping insertion in model container [2023-03-31 22:15:35,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:15:35" (3/3) ... [2023-03-31 22:15:35,842 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label09.c [2023-03-31 22:15:35,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:15:35,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:15:35,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:15:35,918 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;@675c2ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:15:35,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:15:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:15:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:15:35,929 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:35,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:35,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:35,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:35,935 INFO L85 PathProgramCache]: Analyzing trace with hash -510219449, now seen corresponding path program 1 times [2023-03-31 22:15:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:35,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402766566] [2023-03-31 22:15:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:35,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:36,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:36,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402766566] [2023-03-31 22:15:36,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402766566] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:36,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:15:36,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:15:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585759487] [2023-03-31 22:15:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:15:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:15:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:15:36,283 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:15:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:15:37,594 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:15:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:15:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:15:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:15:37,608 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:15:37,608 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:15:37,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:15:37,616 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 273 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:15:37,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 56 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:15:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:15:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 461. [2023-03-31 22:15:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 451 states have (on average 1.9113082039911309) internal successors, (862), 451 states have internal predecessors, (862), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:15:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 873 transitions. [2023-03-31 22:15:37,677 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 873 transitions. Word has length 11 [2023-03-31 22:15:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:15:37,677 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 873 transitions. [2023-03-31 22:15:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:15:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 873 transitions. [2023-03-31 22:15:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:15:37,679 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:37,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:15:37,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:37,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1946871356, now seen corresponding path program 1 times [2023-03-31 22:15:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131693887] [2023-03-31 22:15:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:37,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:37,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131693887] [2023-03-31 22:15:37,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131693887] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:37,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:15:37,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:15:37,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032282062] [2023-03-31 22:15:37,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:37,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:15:37,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:15:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:15:37,888 INFO L87 Difference]: Start difference. First operand 461 states and 873 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:15:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:15:39,160 INFO L93 Difference]: Finished difference Result 1387 states and 2652 transitions. [2023-03-31 22:15:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:15:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-03-31 22:15:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:15:39,169 INFO L225 Difference]: With dead ends: 1387 [2023-03-31 22:15:39,169 INFO L226 Difference]: Without dead ends: 931 [2023-03-31 22:15:39,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:15:39,172 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:15:39,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:15:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-03-31 22:15:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 923. [2023-03-31 22:15:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 903 states have (on average 1.663344407530454) internal successors, (1502), 907 states have internal predecessors, (1502), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-03-31 22:15:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1537 transitions. [2023-03-31 22:15:39,253 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1537 transitions. Word has length 23 [2023-03-31 22:15:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:15:39,253 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1537 transitions. [2023-03-31 22:15:39,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:15:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1537 transitions. [2023-03-31 22:15:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 22:15:39,255 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:39,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:39,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:15:39,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:39,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1272924901, now seen corresponding path program 1 times [2023-03-31 22:15:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:39,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598606263] [2023-03-31 22:15:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:15:39,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598606263] [2023-03-31 22:15:39,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598606263] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:15:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780768447] [2023-03-31 22:15:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:39,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:15:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:15:39,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:15:39,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:15:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:39,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:15:39,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:15:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:39,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:15:39,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780768447] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:39,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:15:39,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:15:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129955463] [2023-03-31 22:15:39,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:39,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:15:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:15:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:15:39,692 INFO L87 Difference]: Start difference. First operand 923 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:15:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:15:40,514 INFO L93 Difference]: Finished difference Result 1381 states and 2201 transitions. [2023-03-31 22:15:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:15:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-03-31 22:15:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:15:40,521 INFO L225 Difference]: With dead ends: 1381 [2023-03-31 22:15:40,521 INFO L226 Difference]: Without dead ends: 1379 [2023-03-31 22:15:40,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:15:40,523 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 247 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:15:40,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 145 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 22:15:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2023-03-31 22:15:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 933. [2023-03-31 22:15:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 910 states have (on average 1.6582417582417583) internal successors, (1509), 915 states have internal predecessors, (1509), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2023-03-31 22:15:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1554 transitions. [2023-03-31 22:15:40,558 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1554 transitions. Word has length 52 [2023-03-31 22:15:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:15:40,559 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1554 transitions. [2023-03-31 22:15:40,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:15:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1554 transitions. [2023-03-31 22:15:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 22:15:40,564 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:40,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:40,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:15:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:15:40,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:40,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash 909639716, now seen corresponding path program 1 times [2023-03-31 22:15:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:40,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203113115] [2023-03-31 22:15:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:40,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:41,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203113115] [2023-03-31 22:15:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203113115] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:41,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:15:41,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:15:41,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496725967] [2023-03-31 22:15:41,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:41,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:15:41,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:41,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:15:41,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:15:41,072 INFO L87 Difference]: Start difference. First operand 933 states and 1554 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:15:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:15:42,410 INFO L93 Difference]: Finished difference Result 2572 states and 4312 transitions. [2023-03-31 22:15:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:15:42,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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 67 [2023-03-31 22:15:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:15:42,420 INFO L225 Difference]: With dead ends: 2572 [2023-03-31 22:15:42,420 INFO L226 Difference]: Without dead ends: 1644 [2023-03-31 22:15:42,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:15:42,424 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 798 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:15:42,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 48 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:15:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2023-03-31 22:15:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1608. [2023-03-31 22:15:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1575 states have (on average 1.4984126984126984) internal successors, (2360), 1582 states have internal predecessors, (2360), 13 states have call successors, (13), 13 states have call predecessors, (13), 19 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-03-31 22:15:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2455 transitions. [2023-03-31 22:15:42,476 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2455 transitions. Word has length 67 [2023-03-31 22:15:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:15:42,476 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2455 transitions. [2023-03-31 22:15:42,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:15:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2455 transitions. [2023-03-31 22:15:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-03-31 22:15:42,479 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:42,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 22:15:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:15:42,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:42,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash 203575685, now seen corresponding path program 1 times [2023-03-31 22:15:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913428646] [2023-03-31 22:15:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:42,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913428646] [2023-03-31 22:15:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913428646] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:15:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133085063] [2023-03-31 22:15:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:42,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:15:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:15:42,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:15:42,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:15:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:42,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:15:42,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:15:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:42,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:15:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133085063] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:15:43,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935631234] [2023-03-31 22:15:43,235 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:15:43,235 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:15:43,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:15:43,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:15:43,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:15:43,368 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:15:43,543 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2023-03-31 22:15:43,776 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2023-03-31 22:15:44,564 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:15:44,712 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2023-03-31 22:15:46,159 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2023-03-31 22:15:46,425 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 34408 conjuctions. This might take some time... [2023-03-31 22:15:50,047 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1562 conjuctions.