/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:16:13,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:16:13,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:16:13,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:16:13,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:16:13,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:16:13,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:16:13,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:16:13,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:16:13,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:16:13,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:16:13,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:16:13,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:16:13,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:16:13,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:16:13,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:16:13,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:16:13,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:16:13,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:16:13,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:16:13,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:16:13,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:16:13,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:16:13,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:16:13,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:16:13,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:16:13,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:16:13,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:16:13,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:16:13,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:16:13,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:16:13,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:16:13,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:16:13,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:16:13,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:16:13,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:16:13,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:16:13,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:16:13,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:16:13,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:16:13,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:16:13,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:16:13,619 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:16:13,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:16:13,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:16:13,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:16:13,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:16:13,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:16:13,621 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:16:13,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:16:13,621 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:16:13,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:16:13,621 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:16:13,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:16:13,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:16:13,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:16:13,622 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:16:13,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:16:13,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:16:13,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:16:13,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:16:13,623 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:16:13,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:16:13,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:16:13,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:16:13,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:16:13,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:16:13,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:16:13,625 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:16:13,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:16:13,625 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:16:13,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:16:13,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:16:13,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:16:13,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:16:13,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:16:13,626 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:16:13,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:16:13,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:16:13,627 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:16:13,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:16:13,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:16:13,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:16:13,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:16:13,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:16:13,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:16:13,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:16:13,885 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:16:13,886 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:16:13,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label47.c [2023-03-31 21:16:15,064 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:16:15,348 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:16:15,348 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label47.c [2023-03-31 21:16:15,356 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911921dfc/f4cb7754815e41fb9ebeb0402bf92809/FLAG5bef4d814 [2023-03-31 21:16:15,678 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911921dfc/f4cb7754815e41fb9ebeb0402bf92809 [2023-03-31 21:16:15,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:16:15,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:16:15,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:16:15,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:16:15,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:16:15,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:16:15" (1/1) ... [2023-03-31 21:16:15,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24170770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:15, skipping insertion in model container [2023-03-31 21:16:15,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:16:15" (1/1) ... [2023-03-31 21:16:15,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:16:15,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:16:16,023 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_label47.c[17583,17596] [2023-03-31 21:16:16,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:16:16,081 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:16:16,165 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_label47.c[17583,17596] [2023-03-31 21:16:16,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:16:16,189 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:16:16,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16 WrapperNode [2023-03-31 21:16:16,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:16:16,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:16:16,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:16:16,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:16:16,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,260 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:16:16,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:16:16,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:16:16,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:16:16,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (1/1) ... [2023-03-31 21:16:16,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:16:16,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:16,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:16:16,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:16:16,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:16:16,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:16:16,346 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:16:16,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:16:16,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:16:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:16:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:16:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:16:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:16:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:16:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:16:16,436 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:16:16,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:16:17,341 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:16:17,584 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:16:17,584 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:16:17,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:16:17 BoogieIcfgContainer [2023-03-31 21:16:17,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:16:17,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:16:17,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:16:17,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:16:17,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:16:15" (1/3) ... [2023-03-31 21:16:17,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515df4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:16:17, skipping insertion in model container [2023-03-31 21:16:17,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:16:16" (2/3) ... [2023-03-31 21:16:17,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515df4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:16:17, skipping insertion in model container [2023-03-31 21:16:17,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:16:17" (3/3) ... [2023-03-31 21:16:17,594 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label47.c [2023-03-31 21:16:17,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:16:17,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:16:17,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:16:17,663 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;@5d3ac0c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:16:17,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:16:17,667 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) [2023-03-31 21:16:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:16:17,678 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:17,679 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] [2023-03-31 21:16:17,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:17,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash -818167977, now seen corresponding path program 1 times [2023-03-31 21:16:17,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837311757] [2023-03-31 21:16:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:18,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:18,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837311757] [2023-03-31 21:16:18,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837311757] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:18,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:18,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:16:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788672566] [2023-03-31 21:16:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:16:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:16:18,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:18,397 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) [2023-03-31 21:16:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:18,858 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:16:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:16:18,861 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 [2023-03-31 21:16:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:18,874 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:16:18,875 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:16:18,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:16:18,881 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:18,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 44 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:16:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:16:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 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) [2023-03-31 21:16:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-03-31 21:16:18,926 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-03-31 21:16:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:18,927 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-03-31 21:16:18,927 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) [2023-03-31 21:16:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-03-31 21:16:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-31 21:16:18,931 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:18,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:16:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:16:18,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:18,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash 363554851, now seen corresponding path program 1 times [2023-03-31 21:16:18,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:18,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764725798] [2023-03-31 21:16:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:18,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:19,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:19,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764725798] [2023-03-31 21:16:19,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764725798] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:19,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:19,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:19,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361387487] [2023-03-31 21:16:19,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:19,520 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:19,986 INFO L93 Difference]: Finished difference Result 537 states and 970 transitions. [2023-03-31 21:16:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:16:19,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-03-31 21:16:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:19,993 INFO L225 Difference]: With dead ends: 537 [2023-03-31 21:16:19,993 INFO L226 Difference]: Without dead ends: 367 [2023-03-31 21:16:20,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:20,003 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 270 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:20,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 46 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-03-31 21:16:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2023-03-31 21:16:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.6253687315634218) internal successors, (551), 347 states have internal predecessors, (551), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-03-31 21:16:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 584 transitions. [2023-03-31 21:16:20,037 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 584 transitions. Word has length 94 [2023-03-31 21:16:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:20,038 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 584 transitions. [2023-03-31 21:16:20,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 584 transitions. [2023-03-31 21:16:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 21:16:20,041 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:20,041 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] [2023-03-31 21:16:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:16:20,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:20,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:20,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1115186025, now seen corresponding path program 1 times [2023-03-31 21:16:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:20,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035056641] [2023-03-31 21:16:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:20,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:20,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:20,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035056641] [2023-03-31 21:16:20,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035056641] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:20,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:20,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:20,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109467798] [2023-03-31 21:16:20,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:20,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:20,243 INFO L87 Difference]: Start difference. First operand 359 states and 584 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:20,687 INFO L93 Difference]: Finished difference Result 1103 states and 1863 transitions. [2023-03-31 21:16:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:16:20,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 97 [2023-03-31 21:16:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:20,694 INFO L225 Difference]: With dead ends: 1103 [2023-03-31 21:16:20,694 INFO L226 Difference]: Without dead ends: 749 [2023-03-31 21:16:20,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:20,697 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 290 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:20,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 44 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-03-31 21:16:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 725. [2023-03-31 21:16:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 682 states have (on average 1.5557184750733137) internal successors, (1061), 705 states have internal predecessors, (1061), 10 states have call successors, (10), 10 states have call predecessors, (10), 32 states have return successors, (99), 9 states have call predecessors, (99), 9 states have call successors, (99) [2023-03-31 21:16:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1170 transitions. [2023-03-31 21:16:20,758 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1170 transitions. Word has length 97 [2023-03-31 21:16:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:20,759 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1170 transitions. [2023-03-31 21:16:20,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:16:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1170 transitions. [2023-03-31 21:16:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 21:16:20,764 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:20,764 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] [2023-03-31 21:16:20,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:16:20,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:20,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash -520309713, now seen corresponding path program 1 times [2023-03-31 21:16:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242615787] [2023-03-31 21:16:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:20,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242615787] [2023-03-31 21:16:20,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242615787] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:20,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:16:20,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:16:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923546387] [2023-03-31 21:16:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:16:20,960 INFO L87 Difference]: Start difference. First operand 725 states and 1170 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) [2023-03-31 21:16:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:21,413 INFO L93 Difference]: Finished difference Result 2037 states and 3508 transitions. [2023-03-31 21:16:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:16:21,413 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 [2023-03-31 21:16:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:21,423 INFO L225 Difference]: With dead ends: 2037 [2023-03-31 21:16:21,423 INFO L226 Difference]: Without dead ends: 1317 [2023-03-31 21:16:21,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:21,433 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:21,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 42 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2023-03-31 21:16:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1269. [2023-03-31 21:16:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1194 states have (on average 1.4036850921273032) internal successors, (1676), 1237 states have internal predecessors, (1676), 16 states have call successors, (16), 16 states have call predecessors, (16), 58 states have return successors, (232), 15 states have call predecessors, (232), 15 states have call successors, (232) [2023-03-31 21:16:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1924 transitions. [2023-03-31 21:16:21,512 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1924 transitions. Word has length 100 [2023-03-31 21:16:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:21,512 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 1924 transitions. [2023-03-31 21:16:21,513 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) [2023-03-31 21:16:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1924 transitions. [2023-03-31 21:16:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-03-31 21:16:21,517 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:21,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 21:16:21,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:16:21,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:21,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1834611959, now seen corresponding path program 1 times [2023-03-31 21:16:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234320755] [2023-03-31 21:16:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:16:21,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:21,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234320755] [2023-03-31 21:16:21,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234320755] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:21,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133859116] [2023-03-31 21:16:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:21,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:21,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:21,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:16:21,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:16:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:21,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:16:21,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:16:21,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:16:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133859116] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:21,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:16:21,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:16:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168367604] [2023-03-31 21:16:21,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:16:21,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:16:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:16:21,954 INFO L87 Difference]: Start difference. First operand 1269 states and 1924 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:16:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:22,458 INFO L93 Difference]: Finished difference Result 3175 states and 4910 transitions. [2023-03-31 21:16:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:16:22,458 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 106 [2023-03-31 21:16:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:22,468 INFO L225 Difference]: With dead ends: 3175 [2023-03-31 21:16:22,468 INFO L226 Difference]: Without dead ends: 1911 [2023-03-31 21:16:22,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:16:22,471 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 256 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:22,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 41 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:16:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-03-31 21:16:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1885. [2023-03-31 21:16:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1782 states have (on average 1.297979797979798) internal successors, (2313), 1839 states have internal predecessors, (2313), 23 states have call successors, (23), 23 states have call predecessors, (23), 79 states have return successors, (320), 22 states have call predecessors, (320), 22 states have call successors, (320) [2023-03-31 21:16:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2656 transitions. [2023-03-31 21:16:22,541 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2656 transitions. Word has length 106 [2023-03-31 21:16:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:22,542 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 2656 transitions. [2023-03-31 21:16:22,542 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:16:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2656 transitions. [2023-03-31 21:16:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-31 21:16:22,546 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:22,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 21:16:22,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:16:22,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:22,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:22,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash 856779239, now seen corresponding path program 1 times [2023-03-31 21:16:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037063638] [2023-03-31 21:16:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:16:23,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:23,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037063638] [2023-03-31 21:16:23,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037063638] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:23,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315787002] [2023-03-31 21:16:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:23,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:23,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:23,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:16:23,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:16:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:23,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:16:23,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 21:16:23,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:16:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315787002] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:16:23,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:16:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:16:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004699593] [2023-03-31 21:16:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:16:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:16:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:16:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:16:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:16:23,254 INFO L87 Difference]: Start difference. First operand 1885 states and 2656 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2023-03-31 21:16:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:16:23,623 INFO L93 Difference]: Finished difference Result 4109 states and 5984 transitions. [2023-03-31 21:16:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:16:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 107 [2023-03-31 21:16:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:16:23,636 INFO L225 Difference]: With dead ends: 4109 [2023-03-31 21:16:23,636 INFO L226 Difference]: Without dead ends: 2229 [2023-03-31 21:16:23,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:16:23,643 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:16:23,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 69 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:16:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2023-03-31 21:16:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2225. [2023-03-31 21:16:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2112 states have (on average 1.259469696969697) internal successors, (2660), 2171 states have internal predecessors, (2660), 27 states have call successors, (27), 27 states have call predecessors, (27), 85 states have return successors, (386), 26 states have call predecessors, (386), 26 states have call successors, (386) [2023-03-31 21:16:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 3073 transitions. [2023-03-31 21:16:23,722 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 3073 transitions. Word has length 107 [2023-03-31 21:16:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:16:23,724 INFO L495 AbstractCegarLoop]: Abstraction has 2225 states and 3073 transitions. [2023-03-31 21:16:23,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2023-03-31 21:16:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 3073 transitions. [2023-03-31 21:16:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-31 21:16:23,729 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:16:23,729 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-03-31 21:16:23,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 21:16:23,936 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,SelfDestructingSolverStorable5 [2023-03-31 21:16:23,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:16:23,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:16:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1302848637, now seen corresponding path program 1 times [2023-03-31 21:16:23,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:16:23,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905853594] [2023-03-31 21:16:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:16:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 21:16:24,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:16:24,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905853594] [2023-03-31 21:16:24,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905853594] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:16:24,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825647019] [2023-03-31 21:16:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:16:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:16:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:16:24,200 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) [2023-03-31 21:16:24,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:16:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:16:24,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:16:24,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:16:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 21:16:24,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:16:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 21:16:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825647019] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:16:24,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809706376] [2023-03-31 21:16:24,475 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:16:24,475 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:16:24,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:16:24,482 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:16:24,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:16:24,676 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:16:25,229 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 75 for LOIs [2023-03-31 21:17:18,421 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-03-31 21:17:19,409 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 84000 conjuctions. This might take some time...