/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/Problem02_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:22:08,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:22:08,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:22:08,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:22:08,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:22:08,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:22:08,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:22:08,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:22:08,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:22:08,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:22:08,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:22:08,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:22:08,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:22:08,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:22:08,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:22:08,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:22:08,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:22:08,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:22:08,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:22:08,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:22:08,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:22:08,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:22:08,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:22:08,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:22:08,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:22:08,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:22:08,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:22:08,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:22:08,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:22:08,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:22:08,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:22:08,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:22:08,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:22:08,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:22:08,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:22:08,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:22:08,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:22:08,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:22:08,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:22:08,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:22:08,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:22:08,467 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 09:22:08,496 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:22:08,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:22:08,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:22:08,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:22:08,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:22:08,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:22:08,498 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:22:08,498 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:22:08,498 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:22:08,499 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:22:08,499 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:22:08,499 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:22:08,499 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:22:08,500 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:22:08,500 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:22:08,500 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:22:08,500 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:22:08,500 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:22:08,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:22:08,501 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:22:08,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:22:08,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:22:08,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:22:08,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:22:08,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:22:08,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:22:08,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:22:08,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:22:08,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:22:08,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:22:08,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:22:08,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:22:08,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:22:08,746 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:22:08,746 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:22:08,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label54.c [2023-04-01 09:22:09,730 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:22:10,069 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:22:10,069 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label54.c [2023-04-01 09:22:10,079 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fbe936a5/d210aec618bd4c3b939dbb7a44b9275d/FLAG4b1c23e62 [2023-04-01 09:22:10,090 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fbe936a5/d210aec618bd4c3b939dbb7a44b9275d [2023-04-01 09:22:10,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:22:10,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:22:10,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:22:10,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:22:10,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:22:10,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d782f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10, skipping insertion in model container [2023-04-01 09:22:10,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:22:10,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:22:10,379 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/Problem02_label54.c[16901,16914] [2023-04-01 09:22:10,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:22:10,419 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:22:10,492 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/Problem02_label54.c[16901,16914] [2023-04-01 09:22:10,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:22:10,529 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:22:10,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10 WrapperNode [2023-04-01 09:22:10,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:22:10,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:22:10,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:22:10,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:22:10,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,600 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:22:10,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:22:10,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:22:10,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:22:10,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (1/1) ... [2023-04-01 09:22:10,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:22:10,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:10,661 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 09:22:10,684 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 09:22:10,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:22:10,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:22:10,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:22:10,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:22:10,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:22:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:22:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:22:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:22:10,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:22:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:22:10,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:22:10,796 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:22:10,798 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:22:11,766 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:22:11,954 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:22:11,955 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:22:11,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:22:11 BoogieIcfgContainer [2023-04-01 09:22:11,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:22:11,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:22:11,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:22:11,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:22:11,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:22:10" (1/3) ... [2023-04-01 09:22:11,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650af36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:22:11, skipping insertion in model container [2023-04-01 09:22:11,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:10" (2/3) ... [2023-04-01 09:22:11,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650af36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:22:11, skipping insertion in model container [2023-04-01 09:22:11,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:22:11" (3/3) ... [2023-04-01 09:22:11,966 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2023-04-01 09:22:11,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:22:11,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:22:12,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:22:12,036 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;@20f6e006, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:22:12,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:22:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 09:22:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:22:12,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:12,053 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] [2023-04-01 09:22:12,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:12,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2027411752, now seen corresponding path program 1 times [2023-04-01 09:22:12,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:12,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852202662] [2023-04-01 09:22:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:12,798 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 09:22:12,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:12,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852202662] [2023-04-01 09:22:12,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852202662] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:12,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:12,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:22:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091505115] [2023-04-01 09:22:12,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:12,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:22:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:22:12,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:22:12,847 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:22:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:13,241 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:22:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:22:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 09:22:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:13,256 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:22:13,257 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:22:13,260 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 09:22:13,265 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:13,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:22:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:22:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:22:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.784431137724551) internal successors, (298), 167 states have internal predecessors, (298), 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 09:22:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 307 transitions. [2023-04-01 09:22:13,314 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 307 transitions. Word has length 86 [2023-04-01 09:22:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:13,315 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 307 transitions. [2023-04-01 09:22:13,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:22:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 307 transitions. [2023-04-01 09:22:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 09:22:13,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:13,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:22:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:22:13,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:13,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1969910228, now seen corresponding path program 1 times [2023-04-01 09:22:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:13,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649220457] [2023-04-01 09:22:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:13,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649220457] [2023-04-01 09:22:13,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649220457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:13,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:13,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:22:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113527267] [2023-04-01 09:22:13,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:13,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:22:13,550 INFO L87 Difference]: Start difference. First operand 175 states and 307 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 09:22:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:13,995 INFO L93 Difference]: Finished difference Result 533 states and 961 transitions. [2023-04-01 09:22:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:22:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 98 [2023-04-01 09:22:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:13,999 INFO L225 Difference]: With dead ends: 533 [2023-04-01 09:22:13,999 INFO L226 Difference]: Without dead ends: 363 [2023-04-01 09:22:14,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:22:14,002 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 288 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:14,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 44 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:22:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-01 09:22:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2023-04-01 09:22:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.7373134328358208) internal successors, (582), 339 states have internal predecessors, (582), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 09:22:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 610 transitions. [2023-04-01 09:22:14,035 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 610 transitions. Word has length 98 [2023-04-01 09:22:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:14,035 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 610 transitions. [2023-04-01 09:22:14,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 09:22:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 610 transitions. [2023-04-01 09:22:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 09:22:14,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:14,040 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:22:14,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:22:14,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:14,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash 255920954, now seen corresponding path program 1 times [2023-04-01 09:22:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566898970] [2023-04-01 09:22:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:14,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:14,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:14,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566898970] [2023-04-01 09:22:14,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566898970] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:14,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:14,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:22:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905466043] [2023-04-01 09:22:14,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:14,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:22:14,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:22:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:22:14,219 INFO L87 Difference]: Start difference. First operand 351 states and 610 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:22:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:14,461 INFO L93 Difference]: Finished difference Result 1039 states and 1862 transitions. [2023-04-01 09:22:14,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:22:14,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 99 [2023-04-01 09:22:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:14,473 INFO L225 Difference]: With dead ends: 1039 [2023-04-01 09:22:14,473 INFO L226 Difference]: Without dead ends: 693 [2023-04-01 09:22:14,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:22:14,484 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:14,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 190 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:22:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-04-01 09:22:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-04-01 09:22:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 666 states have (on average 1.6036036036036037) internal successors, (1068), 673 states have internal predecessors, (1068), 10 states have call successors, (10), 10 states have call predecessors, (10), 16 states have return successors, (73), 9 states have call predecessors, (73), 9 states have call successors, (73) [2023-04-01 09:22:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1151 transitions. [2023-04-01 09:22:14,547 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1151 transitions. Word has length 99 [2023-04-01 09:22:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:14,547 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1151 transitions. [2023-04-01 09:22:14,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:22:14,548 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1151 transitions. [2023-04-01 09:22:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 09:22:14,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:14,563 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:22:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:22:14,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:14,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash -4790800, now seen corresponding path program 1 times [2023-04-01 09:22:14,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891918626] [2023-04-01 09:22:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:14,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891918626] [2023-04-01 09:22:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891918626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:14,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:22:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793881673] [2023-04-01 09:22:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:14,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:22:14,728 INFO L87 Difference]: Start difference. First operand 693 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 09:22:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:15,121 INFO L93 Difference]: Finished difference Result 1953 states and 3505 transitions. [2023-04-01 09:22:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:22:15,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 100 [2023-04-01 09:22:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:15,130 INFO L225 Difference]: With dead ends: 1953 [2023-04-01 09:22:15,130 INFO L226 Difference]: Without dead ends: 1265 [2023-04-01 09:22:15,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:22:15,140 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 354 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:15,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 42 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:22:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2023-04-01 09:22:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1231. [2023-04-01 09:22:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1175 states have (on average 1.4782978723404254) internal successors, (1737), 1199 states have internal predecessors, (1737), 16 states have call successors, (16), 16 states have call predecessors, (16), 39 states have return successors, (224), 15 states have call predecessors, (224), 15 states have call successors, (224) [2023-04-01 09:22:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1977 transitions. [2023-04-01 09:22:15,242 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1977 transitions. Word has length 100 [2023-04-01 09:22:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:15,243 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1977 transitions. [2023-04-01 09:22:15,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 09:22:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1977 transitions. [2023-04-01 09:22:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 09:22:15,253 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:15,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:22:15,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:22:15,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:15,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1875728083, now seen corresponding path program 1 times [2023-04-01 09:22:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:15,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348305815] [2023-04-01 09:22:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:15,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348305815] [2023-04-01 09:22:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348305815] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:22:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:22:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471636847] [2023-04-01 09:22:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:15,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:15,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:22:15,487 INFO L87 Difference]: Start difference. First operand 1231 states and 1977 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 09:22:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:15,936 INFO L93 Difference]: Finished difference Result 2847 states and 4727 transitions. [2023-04-01 09:22:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:22:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 114 [2023-04-01 09:22:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:15,946 INFO L225 Difference]: With dead ends: 2847 [2023-04-01 09:22:15,946 INFO L226 Difference]: Without dead ends: 1621 [2023-04-01 09:22:15,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:22:15,950 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 251 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:15,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 44 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:22:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2023-04-01 09:22:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1607. [2023-04-01 09:22:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1523 states have (on average 1.418253447143795) internal successors, (2160), 1567 states have internal predecessors, (2160), 20 states have call successors, (20), 20 states have call predecessors, (20), 63 states have return successors, (361), 19 states have call predecessors, (361), 19 states have call successors, (361) [2023-04-01 09:22:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2541 transitions. [2023-04-01 09:22:16,007 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2541 transitions. Word has length 114 [2023-04-01 09:22:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:16,007 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2541 transitions. [2023-04-01 09:22:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 09:22:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2541 transitions. [2023-04-01 09:22:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 09:22:16,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:16,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:22:16,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:22:16,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:16,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -936031639, now seen corresponding path program 1 times [2023-04-01 09:22:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243848639] [2023-04-01 09:22:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:22:16,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:16,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243848639] [2023-04-01 09:22:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243848639] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378343590] [2023-04-01 09:22:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:16,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:16,608 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 09:22:16,609 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 09:22:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:16,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:22:16,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:22:16,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:22:16,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378343590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:16,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:22:16,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 09:22:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225441763] [2023-04-01 09:22:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:22:16,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:22:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:22:16,869 INFO L87 Difference]: Start difference. First operand 1607 states and 2541 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:22:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:17,191 INFO L93 Difference]: Finished difference Result 3721 states and 5903 transitions. [2023-04-01 09:22:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:22:17,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 121 [2023-04-01 09:22:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:17,199 INFO L225 Difference]: With dead ends: 3721 [2023-04-01 09:22:17,199 INFO L226 Difference]: Without dead ends: 1427 [2023-04-01 09:22:17,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:22:17,205 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:17,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 173 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:22:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-04-01 09:22:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1421. [2023-04-01 09:22:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1350 states have (on average 1.3251851851851852) internal successors, (1789), 1385 states have internal predecessors, (1789), 18 states have call successors, (18), 18 states have call predecessors, (18), 52 states have return successors, (249), 17 states have call predecessors, (249), 17 states have call successors, (249) [2023-04-01 09:22:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2056 transitions. [2023-04-01 09:22:17,247 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2056 transitions. Word has length 121 [2023-04-01 09:22:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:17,247 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 2056 transitions. [2023-04-01 09:22:17,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:22:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2056 transitions. [2023-04-01 09:22:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 09:22:17,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:17,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:22:17,261 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 09:22:17,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 09:22:17,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:17,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1662760243, now seen corresponding path program 1 times [2023-04-01 09:22:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:17,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237942967] [2023-04-01 09:22:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:22:17,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237942967] [2023-04-01 09:22:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237942967] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573179869] [2023-04-01 09:22:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:17,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:17,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:17,654 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 09:22:17,678 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 09:22:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:17,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:22:17,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:22:17,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:22:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573179869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:22:17,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:22:17,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:22:17,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698355946] [2023-04-01 09:22:17,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:22:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:22:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:22:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:22:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:22:17,834 INFO L87 Difference]: Start difference. First operand 1421 states and 2056 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 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 09:22:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:22:18,229 INFO L93 Difference]: Finished difference Result 3599 states and 5478 transitions. [2023-04-01 09:22:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:22:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 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 123 [2023-04-01 09:22:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:22:18,242 INFO L225 Difference]: With dead ends: 3599 [2023-04-01 09:22:18,243 INFO L226 Difference]: Without dead ends: 2183 [2023-04-01 09:22:18,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:22:18,247 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 344 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:22:18,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 46 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:22:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2023-04-01 09:22:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2137. [2023-04-01 09:22:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2028 states have (on average 1.277120315581854) internal successors, (2590), 2085 states have internal predecessors, (2590), 26 states have call successors, (26), 26 states have call predecessors, (26), 82 states have return successors, (368), 25 states have call predecessors, (368), 25 states have call successors, (368) [2023-04-01 09:22:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2984 transitions. [2023-04-01 09:22:18,320 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2984 transitions. Word has length 123 [2023-04-01 09:22:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:22:18,321 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 2984 transitions. [2023-04-01 09:22:18,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 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 09:22:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2984 transitions. [2023-04-01 09:22:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 09:22:18,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:22:18,327 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:22:18,335 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 09:22:18,533 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,SelfDestructingSolverStorable6 [2023-04-01 09:22:18,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:22:18,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:22:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash 363651713, now seen corresponding path program 1 times [2023-04-01 09:22:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:22:18,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274568244] [2023-04-01 09:22:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:22:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 09:22:19,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:22:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274568244] [2023-04-01 09:22:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274568244] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:22:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568022217] [2023-04-01 09:22:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:22:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:22:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:19,131 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 09:22:19,133 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 09:22:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:22:19,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:22:19,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:22:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:22:19,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:22:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:22:19,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568022217] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:22:19,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071332692] [2023-04-01 09:22:19,474 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:22:19,474 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:22:19,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:22:19,481 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:22:19,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:22:19,875 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs