/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:15:11,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:15:11,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:15:11,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:15:11,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:15:11,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:15:11,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:15:11,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:15:11,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:15:11,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:15:11,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:15:11,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:15:11,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:15:11,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:15:11,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:15:11,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:15:11,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:15:11,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:15:11,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:15:11,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:15:11,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:15:11,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:15:11,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:15:11,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:15:11,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:15:11,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:15:11,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:15:11,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:15:11,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:15:11,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:15:11,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:15:11,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:15:11,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:15:11,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:15:11,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:15:11,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:15:11,761 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 04:15:11,785 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:15:11,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:15:11,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:15:11,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:15:11,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:15:11,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:15:11,787 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:15:11,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:15:11,787 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:15:11,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:15:11,787 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:15:11,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:15:11,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:15:11,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:15:11,788 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:15:11,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:15:11,788 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:15:11,788 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:15:11,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:15:11,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:15:11,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:15:11,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:15:11,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:15:11,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:15:11,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:15:12,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:15:12,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:15:12,013 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:15:12,013 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:15:12,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label41.c [2023-04-01 04:15:12,970 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:15:13,272 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:15:13,273 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label41.c [2023-04-01 04:15:13,288 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5287c4bc6/a99c478c6aff43388df88ab2d998b2f7/FLAGef254f516 [2023-04-01 04:15:13,301 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5287c4bc6/a99c478c6aff43388df88ab2d998b2f7 [2023-04-01 04:15:13,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:15:13,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:15:13,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:15:13,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:15:13,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:15:13,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:15:13" (1/1) ... [2023-04-01 04:15:13,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15539665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:13, skipping insertion in model container [2023-04-01 04:15:13,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:15:13" (1/1) ... [2023-04-01 04:15:13,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:15:13,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:15:13,535 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_label41.c[3200,3213] [2023-04-01 04:15:13,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:15:13,822 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:15:13,842 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_label41.c[3200,3213] [2023-04-01 04:15:14,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:15:14,033 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:15:14,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14 WrapperNode [2023-04-01 04:15:14,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:15:14,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:15:14,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:15:14,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:15:14,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,153 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:15:14,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:15:14,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:15:14,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:15:14,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (1/1) ... [2023-04-01 04:15:14,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:15:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:15:14,206 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 04:15:14,221 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 04:15:14,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:15:14,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:15:14,241 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:15:14,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:15:14,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:15:14,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:15:14,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:15:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:15:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:15:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:15:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:15:14,341 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:15:14,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:15:16,171 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:15:16,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:15:16,621 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:15:16,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:15:16 BoogieIcfgContainer [2023-04-01 04:15:16,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:15:16,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:15:16,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:15:16,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:15:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:15:13" (1/3) ... [2023-04-01 04:15:16,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebc4a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:15:16, skipping insertion in model container [2023-04-01 04:15:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:14" (2/3) ... [2023-04-01 04:15:16,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebc4a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:15:16, skipping insertion in model container [2023-04-01 04:15:16,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:15:16" (3/3) ... [2023-04-01 04:15:16,629 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label41.c [2023-04-01 04:15:16,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:15:16,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:15:16,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:15:16,702 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;@55fa32dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:15:16,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:15:16,706 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 04:15:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:15:16,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:16,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:15:16,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:16,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash 468028068, now seen corresponding path program 1 times [2023-04-01 04:15:16,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:16,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159041137] [2023-04-01 04:15:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:17,017 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 04:15:17,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:17,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159041137] [2023-04-01 04:15:17,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159041137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:17,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:17,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:15:17,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648280773] [2023-04-01 04:15:17,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:17,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:15:17,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:15:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:17,053 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 04:15:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:18,759 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:15:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:15:18,761 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 04:15:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:18,772 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:15:18,772 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:15:18,776 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 04:15:18,779 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:15:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:15:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:15:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:15:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:15:18,839 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:15:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:18,839 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:15:18,839 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 04:15:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:15:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:15:18,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:18,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:15:18,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:15:18,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:18,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1230272038, now seen corresponding path program 1 times [2023-04-01 04:15:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:18,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398307303] [2023-04-01 04:15:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:19,013 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 04:15:19,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:19,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398307303] [2023-04-01 04:15:19,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398307303] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:19,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:19,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:15:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176783752] [2023-04-01 04:15:19,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:15:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:15:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:15:19,017 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:15:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:20,913 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-04-01 04:15:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:15:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:15:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:20,918 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 04:15:20,918 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 04:15:20,919 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 04:15:20,920 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 749 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:20,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 47 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:15:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 04:15:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-04-01 04:15:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.493421052631579) internal successors, (1362), 916 states have internal predecessors, (1362), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 04:15:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1397 transitions. [2023-04-01 04:15:20,958 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1397 transitions. Word has length 23 [2023-04-01 04:15:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:20,959 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1397 transitions. [2023-04-01 04:15:20,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:15:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1397 transitions. [2023-04-01 04:15:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:15:20,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:20,960 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] [2023-04-01 04:15:20,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:15:20,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:20,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2037107529, now seen corresponding path program 1 times [2023-04-01 04:15:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37477161] [2023-04-01 04:15:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:21,064 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 04:15:21,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37477161] [2023-04-01 04:15:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37477161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:15:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684760290] [2023-04-01 04:15:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:15:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:21,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:15:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:15:21,069 INFO L87 Difference]: Start difference. First operand 932 states and 1397 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:15:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:22,980 INFO L93 Difference]: Finished difference Result 2827 states and 4320 transitions. [2023-04-01 04:15:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:15:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 04:15:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:22,991 INFO L225 Difference]: With dead ends: 2827 [2023-04-01 04:15:22,992 INFO L226 Difference]: Without dead ends: 1900 [2023-04-01 04:15:22,996 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 04:15:22,998 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 735 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:22,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 63 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:15:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-04-01 04:15:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1644. [2023-04-01 04:15:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1603 states have (on average 1.3437305053025577) internal successors, (2154), 1622 states have internal predecessors, (2154), 11 states have call successors, (11), 11 states have call predecessors, (11), 29 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) [2023-04-01 04:15:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2245 transitions. [2023-04-01 04:15:23,052 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2245 transitions. Word has length 24 [2023-04-01 04:15:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:23,052 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 2245 transitions. [2023-04-01 04:15:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 04:15:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2245 transitions. [2023-04-01 04:15:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:15:23,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:23,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:15:23,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:15:23,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:23,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:23,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1726315681, now seen corresponding path program 1 times [2023-04-01 04:15:23,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017751081] [2023-04-01 04:15:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:23,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:15:23,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017751081] [2023-04-01 04:15:23,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017751081] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:15:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026507490] [2023-04-01 04:15:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:23,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:15:23,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:15:23,287 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 04:15:23,321 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 04:15:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:23,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:15:23,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:15:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:15:23,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:15:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:15:23,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026507490] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:15:23,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:15:23,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-04-01 04:15:23,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117760626] [2023-04-01 04:15:23,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:23,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:15:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:15:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:15:23,788 INFO L87 Difference]: Start difference. First operand 1644 states and 2245 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:15:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:25,683 INFO L93 Difference]: Finished difference Result 4242 states and 6011 transitions. [2023-04-01 04:15:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:15:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2023-04-01 04:15:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:25,694 INFO L225 Difference]: With dead ends: 4242 [2023-04-01 04:15:25,694 INFO L226 Difference]: Without dead ends: 2603 [2023-04-01 04:15:25,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:15:25,703 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:25,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 37 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:15:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2023-04-01 04:15:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2367. [2023-04-01 04:15:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2303 states have (on average 1.2835432045158488) internal successors, (2956), 2333 states have internal predecessors, (2956), 17 states have call successors, (17), 17 states have call predecessors, (17), 46 states have return successors, (139), 16 states have call predecessors, (139), 16 states have call successors, (139) [2023-04-01 04:15:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3112 transitions. [2023-04-01 04:15:25,771 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3112 transitions. Word has length 60 [2023-04-01 04:15:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:25,772 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3112 transitions. [2023-04-01 04:15:25,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:15:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3112 transitions. [2023-04-01 04:15:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 04:15:25,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:25,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 04:15:25,783 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 04:15:25,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:15:25,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:25,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -799687596, now seen corresponding path program 1 times [2023-04-01 04:15:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093071763] [2023-04-01 04:15:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:15:26,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:26,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093071763] [2023-04-01 04:15:26,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093071763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:26,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:26,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:15:26,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679754631] [2023-04-01 04:15:26,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:26,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:15:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:26,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:15:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:26,403 INFO L87 Difference]: Start difference. First operand 2367 states and 3112 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:15:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:27,637 INFO L93 Difference]: Finished difference Result 6364 states and 8612 transitions. [2023-04-01 04:15:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:15:27,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 162 [2023-04-01 04:15:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:27,652 INFO L225 Difference]: With dead ends: 6364 [2023-04-01 04:15:27,653 INFO L226 Difference]: Without dead ends: 4002 [2023-04-01 04:15:27,657 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 04:15:27,659 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 253 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:27,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 355 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:15:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2023-04-01 04:15:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3746. [2023-04-01 04:15:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3657 states have (on average 1.2398140552365327) internal successors, (4534), 3700 states have internal predecessors, (4534), 23 states have call successors, (23), 23 states have call predecessors, (23), 65 states have return successors, (264), 22 states have call predecessors, (264), 22 states have call successors, (264) [2023-04-01 04:15:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 4821 transitions. [2023-04-01 04:15:27,732 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 4821 transitions. Word has length 162 [2023-04-01 04:15:27,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:27,734 INFO L495 AbstractCegarLoop]: Abstraction has 3746 states and 4821 transitions. [2023-04-01 04:15:27,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:15:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 4821 transitions. [2023-04-01 04:15:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-04-01 04:15:27,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:27,743 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:15:27,743 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:27,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -596997043, now seen corresponding path program 1 times [2023-04-01 04:15:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:27,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964881137] [2023-04-01 04:15:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:15:27,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964881137] [2023-04-01 04:15:27,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964881137] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:15:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382205789] [2023-04-01 04:15:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:27,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:15:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:15:27,990 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 04:15:27,992 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 04:15:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:28,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:15:28,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:15:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:15:28,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:15:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:15:28,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382205789] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:15:28,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550787498] [2023-04-01 04:15:28,286 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:15:28,286 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:15:28,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:15:28,293 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:15:28,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:15:28,446 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:15:28,675 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2023-04-01 04:15:28,875 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16046 conjuctions. This might take some time... [2023-04-01 04:15:29,978 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 893 conjuctions. [2023-04-01 04:15:40,090 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42