/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/Problem15_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:17:28,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:17:28,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:17:28,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:17:28,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:17:28,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:17:28,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:17:28,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:17:28,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:17:28,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:17:28,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:17:28,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:17:28,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:17:28,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:17:28,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:17:28,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:17:28,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:17:28,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:17:28,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:17:28,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:17:28,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:17:28,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:17:28,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:17:28,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:17:28,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:17:28,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:17:28,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:17:28,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:17:28,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:17:28,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:17:28,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:17:28,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:17:28,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:17:28,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:17:28,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:17:28,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:17:28,643 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 10:17:28,663 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:17:28,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:17:28,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:17:28,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:17:28,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:17:28,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:17:28,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:17:28,665 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:17:28,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:17:28,666 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:17:28,666 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:17:28,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:17:28,666 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:17:28,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:17:28,668 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:17:28,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:17:28,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:17:28,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:17:28,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:28,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:17:28,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:17:28,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:17:28,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:17:28,669 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:17:28,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:17:28,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:17:28,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:17:28,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:17:28,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:17:28,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:17:28,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:17:28,864 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:17:28,865 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:17:28,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label32.c [2023-04-01 10:17:30,076 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:17:30,469 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:17:30,469 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label32.c [2023-04-01 10:17:30,488 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbd4c20af/4091274ba2ab4789b00f35dc066f2c1e/FLAGcbeaa8024 [2023-04-01 10:17:30,506 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbd4c20af/4091274ba2ab4789b00f35dc066f2c1e [2023-04-01 10:17:30,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:17:30,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:17:30,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:30,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:17:30,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:17:30,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:30" (1/1) ... [2023-04-01 10:17:30,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa26cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:30, skipping insertion in model container [2023-04-01 10:17:30,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:30" (1/1) ... [2023-04-01 10:17:30,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:17:30,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:17:30,852 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/Problem15_label32.c[6074,6087] [2023-04-01 10:17:31,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:31,190 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:17:31,214 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/Problem15_label32.c[6074,6087] [2023-04-01 10:17:31,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:31,410 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:17:31,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31 WrapperNode [2023-04-01 10:17:31,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:31,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:17:31,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:17:31,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:17:31,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:17:31,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:17:31,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:17:31,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:17:31,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (1/1) ... [2023-04-01 10:17:31,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:31,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:31,610 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 10:17:31,634 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 10:17:31,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:17:31,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:17:31,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:17:31,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:17:31,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:17:31,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:17:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:17:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:17:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:17:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:17:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:17:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:17:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:17:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:17:31,743 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:17:31,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:17:34,242 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:17:34,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:17:34,877 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:17:34,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:34 BoogieIcfgContainer [2023-04-01 10:17:34,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:17:34,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:17:34,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:17:34,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:17:34,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:17:30" (1/3) ... [2023-04-01 10:17:34,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cd0af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:34, skipping insertion in model container [2023-04-01 10:17:34,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:31" (2/3) ... [2023-04-01 10:17:34,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cd0af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:34, skipping insertion in model container [2023-04-01 10:17:34,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:34" (3/3) ... [2023-04-01 10:17:34,890 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label32.c [2023-04-01 10:17:34,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:17:34,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:17:34,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:17:34,972 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;@3834ef17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:17:34,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:17:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:17:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:17:34,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:34,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:34,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:34,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 271521668, now seen corresponding path program 1 times [2023-04-01 10:17:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:35,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334487964] [2023-04-01 10:17:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:35,347 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 10:17:35,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:35,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334487964] [2023-04-01 10:17:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334487964] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:35,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:35,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:35,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890779432] [2023-04-01 10:17:35,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:35,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:35,389 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:17:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:37,103 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-04-01 10:17:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:17:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:37,125 INFO L225 Difference]: With dead ends: 720 [2023-04-01 10:17:37,125 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 10:17:37,131 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 10:17:37,134 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:37,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:17:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 10:17:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-04-01 10:17:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-01 10:17:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-04-01 10:17:37,193 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-04-01 10:17:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:37,193 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-04-01 10:17:37,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:17:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-04-01 10:17:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:17:37,195 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:37,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:37,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:17:37,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:37,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash 739238676, now seen corresponding path program 1 times [2023-04-01 10:17:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:37,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033640446] [2023-04-01 10:17:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:37,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033640446] [2023-04-01 10:17:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033640446] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:37,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:37,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:17:37,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960315440] [2023-04-01 10:17:37,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:37,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:37,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:17:37,451 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:17:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:39,987 INFO L93 Difference]: Finished difference Result 1428 states and 2282 transitions. [2023-04-01 10:17:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:17:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 10:17:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:39,992 INFO L225 Difference]: With dead ends: 1428 [2023-04-01 10:17:39,993 INFO L226 Difference]: Without dead ends: 960 [2023-04-01 10:17:39,995 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 10:17:39,996 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 672 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:39,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 58 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 10:17:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-04-01 10:17:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 940. [2023-04-01 10:17:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.4912663755458515) internal successors, (1366), 924 states have internal predecessors, (1366), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-01 10:17:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1406 transitions. [2023-04-01 10:17:40,048 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1406 transitions. Word has length 31 [2023-04-01 10:17:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:40,048 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1406 transitions. [2023-04-01 10:17:40,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:17:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1406 transitions. [2023-04-01 10:17:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:17:40,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:40,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:40,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:17:40,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:40,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 956849548, now seen corresponding path program 1 times [2023-04-01 10:17:40,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:40,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185032328] [2023-04-01 10:17:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:40,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185032328] [2023-04-01 10:17:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185032328] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:40,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:40,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:17:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412426229] [2023-04-01 10:17:40,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:40,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:40,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:17:40,286 INFO L87 Difference]: Start difference. First operand 940 states and 1406 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 10:17:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:42,393 INFO L93 Difference]: Finished difference Result 2858 states and 4368 transitions. [2023-04-01 10:17:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:17:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-01 10:17:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:42,403 INFO L225 Difference]: With dead ends: 2858 [2023-04-01 10:17:42,404 INFO L226 Difference]: Without dead ends: 1923 [2023-04-01 10:17:42,407 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 10:17:42,408 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:42,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 10:17:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-04-01 10:17:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-04-01 10:17:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3422029702970297) internal successors, (2169), 1640 states have internal predecessors, (2169), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-04-01 10:17:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2264 transitions. [2023-04-01 10:17:42,466 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2264 transitions. Word has length 35 [2023-04-01 10:17:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:42,467 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2264 transitions. [2023-04-01 10:17:42,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 10:17:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2264 transitions. [2023-04-01 10:17:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 10:17:42,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:42,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:42,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:17:42,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:42,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 936423435, now seen corresponding path program 1 times [2023-04-01 10:17:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951494552] [2023-04-01 10:17:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:42,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:42,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:42,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951494552] [2023-04-01 10:17:42,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951494552] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:42,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:42,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:42,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781041184] [2023-04-01 10:17:42,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:42,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:42,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:42,735 INFO L87 Difference]: Start difference. First operand 1666 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 10:17:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:44,104 INFO L93 Difference]: Finished difference Result 4256 states and 5999 transitions. [2023-04-01 10:17:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 152 [2023-04-01 10:17:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:44,116 INFO L225 Difference]: With dead ends: 4256 [2023-04-01 10:17:44,117 INFO L226 Difference]: Without dead ends: 2595 [2023-04-01 10:17:44,121 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 10:17:44,122 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:44,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 10:17:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-04-01 10:17:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-04-01 10:17:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.2676458588331294) internal successors, (3107), 2479 states have internal predecessors, (3107), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-04-01 10:17:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3266 transitions. [2023-04-01 10:17:44,183 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3266 transitions. Word has length 152 [2023-04-01 10:17:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:44,186 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3266 transitions. [2023-04-01 10:17:44,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 10:17:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3266 transitions. [2023-04-01 10:17:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-04-01 10:17:44,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:44,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:17:44,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:44,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1710065986, now seen corresponding path program 1 times [2023-04-01 10:17:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:44,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767160785] [2023-04-01 10:17:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:44,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:44,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767160785] [2023-04-01 10:17:44,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767160785] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:44,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:44,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118898493] [2023-04-01 10:17:44,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:44,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:44,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:44,514 INFO L87 Difference]: Start difference. First operand 2513 states and 3266 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 10:17:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:46,679 INFO L93 Difference]: Finished difference Result 5948 states and 8028 transitions. [2023-04-01 10:17:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 226 [2023-04-01 10:17:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:46,695 INFO L225 Difference]: With dead ends: 5948 [2023-04-01 10:17:46,695 INFO L226 Difference]: Without dead ends: 3440 [2023-04-01 10:17:46,701 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 10:17:46,702 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 223 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:46,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 455 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 10:17:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2023-04-01 10:17:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3170. [2023-04-01 10:17:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3096 states have (on average 1.2512919896640826) internal successors, (3874), 3128 states have internal predecessors, (3874), 21 states have call successors, (21), 21 states have call predecessors, (21), 52 states have return successors, (215), 20 states have call predecessors, (215), 20 states have call successors, (215) [2023-04-01 10:17:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4110 transitions. [2023-04-01 10:17:46,776 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4110 transitions. Word has length 226 [2023-04-01 10:17:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:46,777 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 4110 transitions. [2023-04-01 10:17:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 10:17:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4110 transitions. [2023-04-01 10:17:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 10:17:46,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:46,780 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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, 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] [2023-04-01 10:17:46,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:17:46,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:46,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1742442952, now seen corresponding path program 1 times [2023-04-01 10:17:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776047807] [2023-04-01 10:17:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:46,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 10:17:47,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:47,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776047807] [2023-04-01 10:17:47,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776047807] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:47,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402900299] [2023-04-01 10:17:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:47,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:17:47,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:47,323 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 10:17:47,327 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 10:17:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:47,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:17:47,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:17:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 10:17:47,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:17:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 10:17:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402900299] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:17:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [151879544] [2023-04-01 10:17:47,871 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:17:47,871 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:17:47,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:17:47,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:17:47,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:17:48,153 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:17:48,719 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2023-04-01 10:17:49,152 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6761 conjuctions. This might take some time... [2023-04-01 10:17:49,278 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 82 conjuctions. [2023-04-01 10:17:54,407 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18