/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:22:57,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:22:57,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:22:57,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:22:57,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:22:57,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:22:57,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:22:57,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:22:57,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:22:57,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:22:57,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:22:57,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:22:57,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:22:57,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:22:57,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:22:57,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:22:57,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:22:57,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:22:57,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:22:57,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:22:57,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:22:57,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:22:57,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:22:57,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:22:57,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:22:57,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:22:57,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:22:57,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:22:57,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:22:57,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:22:57,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:22:57,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:22:57,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:22:57,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:22:57,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:22:57,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:22:57,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:22:57,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:22:57,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:22:57,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:22:57,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:22:57,402 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 09:22:57,424 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:22:57,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:22:57,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:22:57,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:22:57,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:22:57,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:22:57,425 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:22:57,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:22:57,425 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:22:57,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:22:57,426 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:22:57,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:22:57,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:22:57,426 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:22:57,426 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:22:57,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:22:57,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:22:57,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:22:57,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:22:57,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:22:57,428 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:22:57,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:22:57,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:22:57,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:22:57,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:22:57,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:22:57,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:22:57,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:22:57,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:22:57,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:22:57,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:22:57,622 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:22:57,623 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:22:57,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label03.c [2023-04-01 09:22:58,558 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:22:58,783 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:22:58,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label03.c [2023-04-01 09:22:58,794 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90719dfe/56a6855a63e549a4b389a719efff0037/FLAG48e1c3d2c [2023-04-01 09:22:58,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90719dfe/56a6855a63e549a4b389a719efff0037 [2023-04-01 09:22:58,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:22:58,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:22:58,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:22:58,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:22:58,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:22:58,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:22:58" (1/1) ... [2023-04-01 09:22:58,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb5e999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:58, skipping insertion in model container [2023-04-01 09:22:58,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:22:58" (1/1) ... [2023-04-01 09:22:58,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:22:58,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:22:59,227 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label03.c[56355,56368] [2023-04-01 09:22:59,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:22:59,255 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:22:59,394 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label03.c[56355,56368] [2023-04-01 09:22:59,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:22:59,414 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:22:59,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59 WrapperNode [2023-04-01 09:22:59,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:22:59,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:22:59,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:22:59,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:22:59,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,494 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:22:59,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:22:59,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:22:59,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:22:59,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (1/1) ... [2023-04-01 09:22:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:22:59,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:22:59,528 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 09:22:59,557 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 09:22:59,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:22:59,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:22:59,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:22:59,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:22:59,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:22:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:22:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:22:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:22:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:22:59,626 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:22:59,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:23:00,754 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:23:00,954 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:23:00,955 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:23:00,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:23:00 BoogieIcfgContainer [2023-04-01 09:23:00,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:23:00,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:23:00,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:23:00,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:23:00,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:22:58" (1/3) ... [2023-04-01 09:23:00,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58dfad5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:23:00, skipping insertion in model container [2023-04-01 09:23:00,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:22:59" (2/3) ... [2023-04-01 09:23:00,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58dfad5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:23:00, skipping insertion in model container [2023-04-01 09:23:00,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:23:00" (3/3) ... [2023-04-01 09:23:00,962 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label03.c [2023-04-01 09:23:00,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:23:00,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:23:01,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:23:01,012 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;@79b8eba5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:23:01,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:23:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:23:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:23:01,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:01,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:23:01,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:01,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 597531827, now seen corresponding path program 1 times [2023-04-01 09:23:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461670683] [2023-04-01 09:23:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:01,936 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 09:23:01,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461670683] [2023-04-01 09:23:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461670683] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:01,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:01,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:23:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677952786] [2023-04-01 09:23:01,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:01,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:23:01,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:23:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:23:01,971 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:23:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:02,508 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:23:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:23:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-01 09:23:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:02,537 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:23:02,537 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:23:02,540 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 09:23:02,542 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:02,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:23:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:23:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:23:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.89419795221843) internal successors, (555), 293 states have internal predecessors, (555), 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 09:23:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2023-04-01 09:23:02,579 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2023-04-01 09:23:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:02,580 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2023-04-01 09:23:02,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:23:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2023-04-01 09:23:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 09:23:02,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:02,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:23:02,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:23:02,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:02,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash 15706477, now seen corresponding path program 1 times [2023-04-01 09:23:02,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:02,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939368616] [2023-04-01 09:23:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:23:02,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939368616] [2023-04-01 09:23:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939368616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:02,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:02,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:23:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270455787] [2023-04-01 09:23:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:23:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:23:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:23:02,902 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:23:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:03,238 INFO L93 Difference]: Finished difference Result 913 states and 1729 transitions. [2023-04-01 09:23:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:23:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2023-04-01 09:23:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:03,243 INFO L225 Difference]: With dead ends: 913 [2023-04-01 09:23:03,243 INFO L226 Difference]: Without dead ends: 617 [2023-04-01 09:23:03,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:23:03,245 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:03,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:23:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-01 09:23:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 603. [2023-04-01 09:23:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.8824531516183987) internal successors, (1105), 591 states have internal predecessors, (1105), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-01 09:23:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-01 09:23:03,271 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-01 09:23:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:03,272 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-01 09:23:03,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:23:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-01 09:23:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 09:23:03,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:03,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:03,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:23:03,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:03,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -848550766, now seen corresponding path program 1 times [2023-04-01 09:23:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:03,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425319176] [2023-04-01 09:23:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:03,571 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 09:23:03,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:03,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425319176] [2023-04-01 09:23:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425319176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:03,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:03,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:23:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886858890] [2023-04-01 09:23:03,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:23:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:23:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:23:03,574 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:23:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:04,230 INFO L93 Difference]: Finished difference Result 1861 states and 3585 transitions. [2023-04-01 09:23:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:23:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 09:23:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:04,242 INFO L225 Difference]: With dead ends: 1861 [2023-04-01 09:23:04,242 INFO L226 Difference]: Without dead ends: 1263 [2023-04-01 09:23:04,244 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 09:23:04,245 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:04,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:23:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-04-01 09:23:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1231. [2023-04-01 09:23:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1187 states have (on average 1.818871103622578) internal successors, (2159), 1211 states have internal predecessors, (2159), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (115), 9 states have call predecessors, (115), 9 states have call successors, (115) [2023-04-01 09:23:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2284 transitions. [2023-04-01 09:23:04,343 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2284 transitions. Word has length 161 [2023-04-01 09:23:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:04,343 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2284 transitions. [2023-04-01 09:23:04,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:23:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2284 transitions. [2023-04-01 09:23:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 09:23:04,348 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:04,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:04,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:23:04,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:04,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash 973395621, now seen corresponding path program 1 times [2023-04-01 09:23:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238013570] [2023-04-01 09:23:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:04,662 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 09:23:04,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238013570] [2023-04-01 09:23:04,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238013570] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:04,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:23:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474966153] [2023-04-01 09:23:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:04,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:23:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:23:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:23:04,666 INFO L87 Difference]: Start difference. First operand 1231 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 09:23:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:05,348 INFO L93 Difference]: Finished difference Result 3813 states and 7454 transitions. [2023-04-01 09:23:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:23:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 162 [2023-04-01 09:23:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:05,359 INFO L225 Difference]: With dead ends: 3813 [2023-04-01 09:23:05,359 INFO L226 Difference]: Without dead ends: 2587 [2023-04-01 09:23:05,362 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 09:23:05,369 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 506 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:05,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 39 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:23:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-04-01 09:23:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2551. [2023-04-01 09:23:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2419 states have (on average 1.5473336089293097) internal successors, (3743), 2515 states have internal predecessors, (3743), 18 states have call successors, (18), 18 states have call predecessors, (18), 113 states have return successors, (411), 17 states have call predecessors, (411), 17 states have call successors, (411) [2023-04-01 09:23:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 4172 transitions. [2023-04-01 09:23:05,452 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 4172 transitions. Word has length 162 [2023-04-01 09:23:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:05,453 INFO L495 AbstractCegarLoop]: Abstraction has 2551 states and 4172 transitions. [2023-04-01 09:23:05,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 09:23:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 4172 transitions. [2023-04-01 09:23:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 09:23:05,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:05,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:05,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:23:05,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:05,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1089863790, now seen corresponding path program 1 times [2023-04-01 09:23:05,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:05,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739323174] [2023-04-01 09:23:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:05,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:06,093 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 09:23:06,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739323174] [2023-04-01 09:23:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739323174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:06,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:06,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:23:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848625756] [2023-04-01 09:23:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:06,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:23:06,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:23:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:23:06,095 INFO L87 Difference]: Start difference. First operand 2551 states and 4172 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 09:23:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:06,865 INFO L93 Difference]: Finished difference Result 6149 states and 10089 transitions. [2023-04-01 09:23:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:23:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 163 [2023-04-01 09:23:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:06,877 INFO L225 Difference]: With dead ends: 6149 [2023-04-01 09:23:06,877 INFO L226 Difference]: Without dead ends: 3603 [2023-04-01 09:23:06,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:23:06,881 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 448 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:06,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 55 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:23:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2023-04-01 09:23:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3525. [2023-04-01 09:23:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 3335 states have (on average 1.497151424287856) internal successors, (4993), 3477 states have internal predecessors, (4993), 24 states have call successors, (24), 24 states have call predecessors, (24), 165 states have return successors, (649), 23 states have call predecessors, (649), 23 states have call successors, (649) [2023-04-01 09:23:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5666 transitions. [2023-04-01 09:23:06,953 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5666 transitions. Word has length 163 [2023-04-01 09:23:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:06,953 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5666 transitions. [2023-04-01 09:23:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 09:23:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5666 transitions. [2023-04-01 09:23:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 09:23:06,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:06,959 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:23:06,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:23:06,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:06,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash 153686293, now seen corresponding path program 1 times [2023-04-01 09:23:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:06,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474064376] [2023-04-01 09:23:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:23:07,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474064376] [2023-04-01 09:23:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474064376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:07,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:07,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:23:07,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340185898] [2023-04-01 09:23:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:07,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:23:07,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:23:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:23:07,156 INFO L87 Difference]: Start difference. First operand 3525 states and 5666 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 09:23:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:07,680 INFO L93 Difference]: Finished difference Result 10091 states and 16774 transitions. [2023-04-01 09:23:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:23:07,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 170 [2023-04-01 09:23:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:07,712 INFO L225 Difference]: With dead ends: 10091 [2023-04-01 09:23:07,713 INFO L226 Difference]: Without dead ends: 6571 [2023-04-01 09:23:07,719 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 09:23:07,720 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:07,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 289 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:23:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6571 states. [2023-04-01 09:23:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6571 to 6569. [2023-04-01 09:23:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6287 states have (on average 1.414347065372992) internal successors, (8892), 6481 states have internal predecessors, (8892), 44 states have call successors, (44), 44 states have call predecessors, (44), 237 states have return successors, (1405), 43 states have call predecessors, (1405), 43 states have call successors, (1405) [2023-04-01 09:23:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 10341 transitions. [2023-04-01 09:23:07,846 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 10341 transitions. Word has length 170 [2023-04-01 09:23:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:07,847 INFO L495 AbstractCegarLoop]: Abstraction has 6569 states and 10341 transitions. [2023-04-01 09:23:07,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 09:23:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 10341 transitions. [2023-04-01 09:23:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 09:23:07,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:07,857 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:23:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 09:23:07,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:07,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:07,857 INFO L85 PathProgramCache]: Analyzing trace with hash -165288925, now seen corresponding path program 1 times [2023-04-01 09:23:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:07,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770561172] [2023-04-01 09:23:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:07,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:23:08,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770561172] [2023-04-01 09:23:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770561172] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:23:08,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:23:08,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:23:08,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065815258] [2023-04-01 09:23:08,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:08,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:23:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:23:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:23:08,435 INFO L87 Difference]: Start difference. First operand 6569 states and 10341 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 09:23:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:09,208 INFO L93 Difference]: Finished difference Result 16461 states and 26878 transitions. [2023-04-01 09:23:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:23:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 181 [2023-04-01 09:23:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:09,251 INFO L225 Difference]: With dead ends: 16461 [2023-04-01 09:23:09,252 INFO L226 Difference]: Without dead ends: 9897 [2023-04-01 09:23:09,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:23:09,269 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 470 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:09,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 48 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:23:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2023-04-01 09:23:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 9775. [2023-04-01 09:23:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9775 states, 9320 states have (on average 1.3990343347639485) internal successors, (13039), 9647 states have internal predecessors, (13039), 64 states have call successors, (64), 64 states have call predecessors, (64), 390 states have return successors, (2397), 63 states have call predecessors, (2397), 63 states have call successors, (2397) [2023-04-01 09:23:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9775 states to 9775 states and 15500 transitions. [2023-04-01 09:23:09,548 INFO L78 Accepts]: Start accepts. Automaton has 9775 states and 15500 transitions. Word has length 181 [2023-04-01 09:23:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:09,549 INFO L495 AbstractCegarLoop]: Abstraction has 9775 states and 15500 transitions. [2023-04-01 09:23:09,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 09:23:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9775 states and 15500 transitions. [2023-04-01 09:23:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 09:23:09,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:09,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:23:09,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 09:23:09,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:09,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1096260473, now seen corresponding path program 1 times [2023-04-01 09:23:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:09,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495456866] [2023-04-01 09:23:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:09,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:23:10,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495456866] [2023-04-01 09:23:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495456866] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:23:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059957672] [2023-04-01 09:23:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:10,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:23:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:23:10,175 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 09:23:10,203 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 09:23:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:10,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:23:10,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:23:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 09:23:10,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:23:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 09:23:10,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059957672] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 09:23:10,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:23:10,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 4] total 11 [2023-04-01 09:23:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307902523] [2023-04-01 09:23:10,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:23:10,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:23:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:23:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:23:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:23:10,969 INFO L87 Difference]: Start difference. First operand 9775 states and 15500 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:23:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:23:11,587 INFO L93 Difference]: Finished difference Result 28038 states and 45610 transitions. [2023-04-01 09:23:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:23:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 192 [2023-04-01 09:23:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:23:11,645 INFO L225 Difference]: With dead ends: 28038 [2023-04-01 09:23:11,645 INFO L226 Difference]: Without dead ends: 18564 [2023-04-01 09:23:11,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 378 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:23:11,667 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 215 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:23:11,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 27 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:23:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18564 states. [2023-04-01 09:23:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18564 to 18548. [2023-04-01 09:23:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18548 states, 17782 states have (on average 1.3478236418850522) internal successors, (23967), 18306 states have internal predecessors, (23967), 121 states have call successors, (121), 121 states have call predecessors, (121), 644 states have return successors, (4630), 120 states have call predecessors, (4630), 120 states have call successors, (4630) [2023-04-01 09:23:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18548 states to 18548 states and 28718 transitions. [2023-04-01 09:23:12,135 INFO L78 Accepts]: Start accepts. Automaton has 18548 states and 28718 transitions. Word has length 192 [2023-04-01 09:23:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:23:12,135 INFO L495 AbstractCegarLoop]: Abstraction has 18548 states and 28718 transitions. [2023-04-01 09:23:12,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:23:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18548 states and 28718 transitions. [2023-04-01 09:23:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-01 09:23:12,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:23:12,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:23:12,191 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 09:23:12,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:23:12,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:23:12,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:23:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash -912212017, now seen corresponding path program 1 times [2023-04-01 09:23:12,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:23:12,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60999800] [2023-04-01 09:23:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:12,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:23:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 71 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 09:23:12,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:23:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60999800] [2023-04-01 09:23:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60999800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:23:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280915213] [2023-04-01 09:23:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:23:12,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:23:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:23:12,750 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 09:23:12,752 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 09:23:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:23:12,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:23:12,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:23:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 09:23:13,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:23:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 09:23:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280915213] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:23:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737527769] [2023-04-01 09:23:13,110 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:23:13,110 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:23:13,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:23:13,142 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:23:13,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:23:13,899 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs