/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:25:29,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:25:29,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:25:29,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:25:29,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:25:29,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:25:29,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:25:29,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:25:29,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:25:29,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:25:29,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:25:29,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:25:29,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:25:29,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:25:29,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:25:29,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:25:29,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:25:29,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:25:29,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:25:29,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:25:29,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:25:29,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:25:29,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:25:29,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:25:29,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:25:29,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:25:29,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:25:29,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:25:29,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:25:29,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:25:29,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:25:29,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:25:29,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:25:29,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:25:29,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:25:29,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:25:29,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:25:29,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:25:29,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:25:29,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:25:29,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:25:29,324 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 09:25:29,343 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:25:29,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:25:29,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:25:29,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:25:29,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:25:29,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:25:29,345 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:25:29,345 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:25:29,346 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:25:29,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:25:29,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:25:29,346 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:25:29,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:25:29,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:25:29,348 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:25:29,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:25:29,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:25:29,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:25:29,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:25:29,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:25:29,348 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:25:29,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:25:29,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:25:29,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:25:29,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:25:29,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:25:29,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:25:29,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:25:29,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:25:29,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:25:29,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:25:29,604 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:25:29,605 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:25:29,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label34.c [2023-04-01 09:25:30,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:25:31,004 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:25:31,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label34.c [2023-04-01 09:25:31,019 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5736789/775ae3d8631b4ff8ba7103b9f10a1a8c/FLAGd9b060c5c [2023-04-01 09:25:31,031 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5736789/775ae3d8631b4ff8ba7103b9f10a1a8c [2023-04-01 09:25:31,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:25:31,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:25:31,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:25:31,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:25:31,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:25:31,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7e1c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31, skipping insertion in model container [2023-04-01 09:25:31,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:25:31,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:25:31,547 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label34.c[59879,59892] [2023-04-01 09:25:31,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:25:31,593 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:25:31,786 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label34.c[59879,59892] [2023-04-01 09:25:31,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:25:31,811 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:25:31,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31 WrapperNode [2023-04-01 09:25:31,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:25:31,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:25:31,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:25:31,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:25:31,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:25:31,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:25:31,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:25:31,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:25:31,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (1/1) ... [2023-04-01 09:25:31,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:25:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:31,981 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 09:25:32,007 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 09:25:32,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:25:32,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:25:32,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:25:32,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:25:32,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:25:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:25:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:25:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:25:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:25:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:25:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:25:32,154 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:25:32,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:25:33,753 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:25:34,031 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:25:34,031 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:25:34,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:25:34 BoogieIcfgContainer [2023-04-01 09:25:34,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:25:34,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:25:34,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:25:34,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:25:34,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:25:31" (1/3) ... [2023-04-01 09:25:34,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397a471f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:25:34, skipping insertion in model container [2023-04-01 09:25:34,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:31" (2/3) ... [2023-04-01 09:25:34,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397a471f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:25:34, skipping insertion in model container [2023-04-01 09:25:34,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:25:34" (3/3) ... [2023-04-01 09:25:34,042 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2023-04-01 09:25:34,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:25:34,059 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:25:34,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:25:34,109 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;@385aa859, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:25:34,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:25:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:25:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:25:34,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:34,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:25:34,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:34,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash 597541366, now seen corresponding path program 1 times [2023-04-01 09:25:34,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:34,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602870976] [2023-04-01 09:25:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:35,206 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 09:25:35,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:35,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602870976] [2023-04-01 09:25:35,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602870976] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:35,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:35,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:25:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280072178] [2023-04-01 09:25:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:35,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:25:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:25:35,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:25:35,261 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:25:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:36,001 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:25:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:25:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-01 09:25:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:36,026 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:25:36,026 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:25:36,031 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 09:25:36,034 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:36,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:25:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:25:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:25:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.8907849829351535) internal successors, (554), 293 states have internal predecessors, (554), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:25:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 563 transitions. [2023-04-01 09:25:36,094 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 563 transitions. Word has length 149 [2023-04-01 09:25:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:36,095 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 563 transitions. [2023-04-01 09:25:36,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:25:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 563 transitions. [2023-04-01 09:25:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 09:25:36,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:36,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:25:36,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:25:36,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:36,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash 15716016, now seen corresponding path program 1 times [2023-04-01 09:25:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:36,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920071676] [2023-04-01 09:25:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:36,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:36,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920071676] [2023-04-01 09:25:36,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920071676] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:36,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:36,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:36,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704795510] [2023-04-01 09:25:36,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:36,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:36,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:36,581 INFO L87 Difference]: Start difference. First operand 301 states and 563 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 09:25:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:37,049 INFO L93 Difference]: Finished difference Result 911 states and 1722 transitions. [2023-04-01 09:25:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:25:37,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-04-01 09:25:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:37,054 INFO L225 Difference]: With dead ends: 911 [2023-04-01 09:25:37,055 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 09:25:37,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:25:37,057 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:37,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:25:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 09:25:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2023-04-01 09:25:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.879045996592845) internal successors, (1103), 591 states have internal predecessors, (1103), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 09:25:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-01 09:25:37,095 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-01 09:25:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:37,095 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-01 09:25:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 09:25:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-01 09:25:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 09:25:37,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:37,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:37,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:25:37,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:37,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1985106252, now seen corresponding path program 1 times [2023-04-01 09:25:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:37,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218053465] [2023-04-01 09:25:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:37,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:37,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:37,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218053465] [2023-04-01 09:25:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218053465] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232302007] [2023-04-01 09:25:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:37,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:37,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:37,917 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 09:25:37,937 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 09:25:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:38,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:25:38,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:25:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:25:38,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:25:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:25:38,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232302007] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:38,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:25:38,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2023-04-01 09:25:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706764231] [2023-04-01 09:25:38,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:38,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:25:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:25:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:25:38,783 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:25:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:39,538 INFO L93 Difference]: Finished difference Result 1809 states and 3464 transitions. [2023-04-01 09:25:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:25:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 160 [2023-04-01 09:25:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:39,545 INFO L225 Difference]: With dead ends: 1809 [2023-04-01 09:25:39,546 INFO L226 Difference]: Without dead ends: 1211 [2023-04-01 09:25:39,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:25:39,548 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:39,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 22 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:25:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-04-01 09:25:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1211. [2023-04-01 09:25:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1177 states have (on average 1.7238742565845369) internal successors, (2029), 1191 states have internal predecessors, (2029), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (92), 9 states have call predecessors, (92), 9 states have call successors, (92) [2023-04-01 09:25:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2131 transitions. [2023-04-01 09:25:39,606 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2131 transitions. Word has length 160 [2023-04-01 09:25:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:39,606 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 2131 transitions. [2023-04-01 09:25:39,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:25:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2131 transitions. [2023-04-01 09:25:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-01 09:25:39,632 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:39,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:39,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:25:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:39,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:39,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash 555693766, now seen corresponding path program 1 times [2023-04-01 09:25:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:39,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611907309] [2023-04-01 09:25:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:39,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:25:40,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611907309] [2023-04-01 09:25:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611907309] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:40,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411633032] [2023-04-01 09:25:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:40,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:40,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:40,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:25:40,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:25:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:40,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:25:40,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:25:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 09:25:40,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:25:40,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411633032] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:40,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:25:40,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:25:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819125990] [2023-04-01 09:25:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:40,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:25:40,625 INFO L87 Difference]: Start difference. First operand 1211 states and 2131 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:25:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:41,535 INFO L93 Difference]: Finished difference Result 3711 states and 6845 transitions. [2023-04-01 09:25:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:25:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 175 [2023-04-01 09:25:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:41,562 INFO L225 Difference]: With dead ends: 3711 [2023-04-01 09:25:41,562 INFO L226 Difference]: Without dead ends: 2505 [2023-04-01 09:25:41,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:25:41,568 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 509 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:41,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 38 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:25:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2023-04-01 09:25:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2477. [2023-04-01 09:25:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2382 states have (on average 1.5969773299748111) internal successors, (3804), 2441 states have internal predecessors, (3804), 18 states have call successors, (18), 18 states have call predecessors, (18), 76 states have return successors, (411), 17 states have call predecessors, (411), 17 states have call successors, (411) [2023-04-01 09:25:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 4233 transitions. [2023-04-01 09:25:41,681 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 4233 transitions. Word has length 175 [2023-04-01 09:25:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:41,681 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 4233 transitions. [2023-04-01 09:25:41,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:25:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 4233 transitions. [2023-04-01 09:25:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 09:25:41,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:41,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:25:41,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:25:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 09:25:41,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:41,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1395151958, now seen corresponding path program 1 times [2023-04-01 09:25:41,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:41,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391656108] [2023-04-01 09:25:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:41,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:42,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391656108] [2023-04-01 09:25:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391656108] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322724637] [2023-04-01 09:25:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:42,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:42,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:42,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:25:42,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:25:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:42,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:25:42,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:25:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:42,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:25:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322724637] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:25:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166042149] [2023-04-01 09:25:42,932 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:25:42,932 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:25:42,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:25:42,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:25:42,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:25:44,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs