/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/Problem03_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:21:16,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:21:16,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:21:16,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:21:16,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:21:16,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:21:16,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:21:16,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:21:16,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:21:16,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:21:16,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:21:16,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:21:16,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:21:16,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:21:16,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:21:16,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:21:16,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:21:16,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:21:16,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:21:16,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:21:16,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:21:16,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:21:16,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:21:16,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:21:16,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:21:16,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:21:16,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:21:16,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:21:16,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:21:16,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:21:16,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:21:16,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:21:16,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:21:16,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:21:16,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:21:16,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:21:16,712 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 03:21:16,735 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:21:16,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:21:16,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:21:16,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:21:16,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:21:16,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:21:16,736 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:21:16,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:21:16,736 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:21:16,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:21:16,737 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:21:16,737 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:21:16,737 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:21:16,737 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:21:16,738 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:21:16,738 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:21:16,738 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:21:16,738 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:21:16,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:21:16,738 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:21:16,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:21:16,740 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:21:16,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:21:16,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:21:16,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:21:16,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:21:16,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:21:16,740 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:21:16,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:21:16,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:21:16,741 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:21:16,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:21:16,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:21:16,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:21:16,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:21:16,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:21:16,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:21:16,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:21:16,935 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:21:16,935 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:21:16,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2023-04-01 03:21:18,266 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:21:18,633 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:21:18,633 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2023-04-01 03:21:18,644 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55866b134/b167adf53bb647f6bdb4de124fbd051d/FLAGf80199dfb [2023-04-01 03:21:18,666 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55866b134/b167adf53bb647f6bdb4de124fbd051d [2023-04-01 03:21:18,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:21:18,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:21:18,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:21:18,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:21:18,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:21:18,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:21:18" (1/1) ... [2023-04-01 03:21:18,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64836b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:18, skipping insertion in model container [2023-04-01 03:21:18,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:21:18" (1/1) ... [2023-04-01 03:21:18,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:21:18,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:21:19,212 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label20.c[60555,60568] [2023-04-01 03:21:19,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:21:19,247 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:21:19,387 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label20.c[60555,60568] [2023-04-01 03:21:19,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:21:19,407 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:21:19,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19 WrapperNode [2023-04-01 03:21:19,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:21:19,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:21:19,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:21:19,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:21:19,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:21:19,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:21:19,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:21:19,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:21:19,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (1/1) ... [2023-04-01 03:21:19,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:21:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:21:19,606 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 03:21:19,625 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 03:21:19,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:21:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:21:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:21:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:21:19,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:21:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:21:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:21:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:21:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:21:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:21:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:21:19,769 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:21:19,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:21:21,307 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:21:21,490 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:21:21,491 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:21:21,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:21:21 BoogieIcfgContainer [2023-04-01 03:21:21,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:21:21,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:21:21,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:21:21,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:21:21,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:21:18" (1/3) ... [2023-04-01 03:21:21,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f444f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:21:21, skipping insertion in model container [2023-04-01 03:21:21,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:21:19" (2/3) ... [2023-04-01 03:21:21,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f444f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:21:21, skipping insertion in model container [2023-04-01 03:21:21,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:21:21" (3/3) ... [2023-04-01 03:21:21,499 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20.c [2023-04-01 03:21:21,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:21:21,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:21:21,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:21:21,548 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;@9934375, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:21:21,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:21:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:21:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:21:21,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:21,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:21,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:21,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash 597542646, now seen corresponding path program 1 times [2023-04-01 03:21:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184022246] [2023-04-01 03:21:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:21,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:22,748 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 03:21:22,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:22,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184022246] [2023-04-01 03:21:22,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184022246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:22,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:22,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:21:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252080317] [2023-04-01 03:21:22,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:21:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:21:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:21:22,796 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:21:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:23,381 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:21:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:21:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-01 03:21:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:23,396 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:21:23,399 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:21:23,405 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 03:21:23,420 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:23,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:21:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:21:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:21:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.89419795221843) internal successors, (555), 293 states have internal predecessors, (555), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:21:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2023-04-01 03:21:23,483 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2023-04-01 03:21:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:23,484 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2023-04-01 03:21:23,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:21:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2023-04-01 03:21:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 03:21:23,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:23,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:23,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:21:23,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:23,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash 15717296, now seen corresponding path program 1 times [2023-04-01 03:21:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:23,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628241985] [2023-04-01 03:21:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:23,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628241985] [2023-04-01 03:21:23,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628241985] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:23,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:23,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685676471] [2023-04-01 03:21:23,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:23,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:23,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:23,784 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:24,118 INFO L93 Difference]: Finished difference Result 913 states and 1729 transitions. [2023-04-01 03:21:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:21:24,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2023-04-01 03:21:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:24,124 INFO L225 Difference]: With dead ends: 913 [2023-04-01 03:21:24,125 INFO L226 Difference]: Without dead ends: 617 [2023-04-01 03:21:24,126 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 03:21:24,127 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:24,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:21:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-01 03:21:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 603. [2023-04-01 03:21:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.8824531516183987) internal successors, (1105), 591 states have internal predecessors, (1105), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-01 03:21:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-01 03:21:24,155 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-01 03:21:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:24,156 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-01 03:21:24,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-01 03:21:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 03:21:24,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:24,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:24,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:21:24,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:24,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash -848539947, now seen corresponding path program 1 times [2023-04-01 03:21:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:24,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446805537] [2023-04-01 03:21:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:24,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:24,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446805537] [2023-04-01 03:21:24,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446805537] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:24,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393559838] [2023-04-01 03:21:24,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:24,518 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:25,237 INFO L93 Difference]: Finished difference Result 1861 states and 3585 transitions. [2023-04-01 03:21:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:21:25,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 161 [2023-04-01 03:21:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:25,244 INFO L225 Difference]: With dead ends: 1861 [2023-04-01 03:21:25,244 INFO L226 Difference]: Without dead ends: 1263 [2023-04-01 03:21:25,245 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 03:21:25,246 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:25,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:21:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-04-01 03:21:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1231. [2023-04-01 03:21:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1187 states have (on average 1.818871103622578) internal successors, (2159), 1211 states have internal predecessors, (2159), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (115), 9 states have call predecessors, (115), 9 states have call successors, (115) [2023-04-01 03:21:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2284 transitions. [2023-04-01 03:21:25,298 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2284 transitions. Word has length 161 [2023-04-01 03:21:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:25,299 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2284 transitions. [2023-04-01 03:21:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2284 transitions. [2023-04-01 03:21:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 03:21:25,305 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:25,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:25,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:21:25,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:25,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash 973406440, now seen corresponding path program 1 times [2023-04-01 03:21:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:25,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001079550] [2023-04-01 03:21:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:25,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:25,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001079550] [2023-04-01 03:21:25,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001079550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:25,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:25,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:25,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562445042] [2023-04-01 03:21:25,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:25,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:25,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:25,701 INFO L87 Difference]: Start difference. First operand 1231 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:26,351 INFO L93 Difference]: Finished difference Result 3841 states and 7497 transitions. [2023-04-01 03:21:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:21:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2023-04-01 03:21:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:26,367 INFO L225 Difference]: With dead ends: 3841 [2023-04-01 03:21:26,367 INFO L226 Difference]: Without dead ends: 2615 [2023-04-01 03:21:26,370 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 03:21:26,376 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 558 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:26,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 44 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:21:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2023-04-01 03:21:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2565. [2023-04-01 03:21:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2426 states have (on average 1.6760098928276999) internal successors, (4066), 2529 states have internal predecessors, (4066), 18 states have call successors, (18), 18 states have call predecessors, (18), 120 states have return successors, (438), 17 states have call predecessors, (438), 17 states have call successors, (438) [2023-04-01 03:21:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4522 transitions. [2023-04-01 03:21:26,479 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4522 transitions. Word has length 162 [2023-04-01 03:21:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:26,479 INFO L495 AbstractCegarLoop]: Abstraction has 2565 states and 4522 transitions. [2023-04-01 03:21:26,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4522 transitions. [2023-04-01 03:21:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 03:21:26,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:26,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:26,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:21:26,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:26,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1089874609, now seen corresponding path program 1 times [2023-04-01 03:21:26,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:26,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036094570] [2023-04-01 03:21:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:27,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:27,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036094570] [2023-04-01 03:21:27,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036094570] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:27,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:27,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765593116] [2023-04-01 03:21:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:27,154 INFO L87 Difference]: Start difference. First operand 2565 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:27,890 INFO L93 Difference]: Finished difference Result 6549 states and 11823 transitions. [2023-04-01 03:21:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:21:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 163 [2023-04-01 03:21:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:27,907 INFO L225 Difference]: With dead ends: 6549 [2023-04-01 03:21:27,907 INFO L226 Difference]: Without dead ends: 3989 [2023-04-01 03:21:27,914 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 03:21:27,917 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 489 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:27,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 46 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:21:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2023-04-01 03:21:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3891. [2023-04-01 03:21:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3661 states have (on average 1.6293362469270691) internal successors, (5965), 3839 states have internal predecessors, (5965), 26 states have call successors, (26), 26 states have call predecessors, (26), 203 states have return successors, (770), 25 states have call predecessors, (770), 25 states have call successors, (770) [2023-04-01 03:21:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 6761 transitions. [2023-04-01 03:21:28,057 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 6761 transitions. Word has length 163 [2023-04-01 03:21:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:28,058 INFO L495 AbstractCegarLoop]: Abstraction has 3891 states and 6761 transitions. [2023-04-01 03:21:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 6761 transitions. [2023-04-01 03:21:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 03:21:28,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:28,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 03:21:28,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:28,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 153697112, now seen corresponding path program 1 times [2023-04-01 03:21:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178866467] [2023-04-01 03:21:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:29,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178866467] [2023-04-01 03:21:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178866467] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:21:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562162802] [2023-04-01 03:21:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:29,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:21:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:21:29,375 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 03:21:29,389 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 03:21:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:29,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:21:29,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:21:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:29,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:21:29,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562162802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:29,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:21:29,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 03:21:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500239996] [2023-04-01 03:21:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:29,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:21:29,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:21:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:21:29,839 INFO L87 Difference]: Start difference. First operand 3891 states and 6761 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:21:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:30,451 INFO L93 Difference]: Finished difference Result 11008 states and 19852 transitions. [2023-04-01 03:21:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:21:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-04-01 03:21:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:30,495 INFO L225 Difference]: With dead ends: 11008 [2023-04-01 03:21:30,495 INFO L226 Difference]: Without dead ends: 7122 [2023-04-01 03:21:30,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:21:30,507 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:30,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 286 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:21:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2023-04-01 03:21:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 7114. [2023-04-01 03:21:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 6774 states have (on average 1.5490109241216417) internal successors, (10493), 7020 states have internal predecessors, (10493), 47 states have call successors, (47), 47 states have call predecessors, (47), 292 states have return successors, (1610), 46 states have call predecessors, (1610), 46 states have call successors, (1610) [2023-04-01 03:21:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 12150 transitions. [2023-04-01 03:21:30,825 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 12150 transitions. Word has length 170 [2023-04-01 03:21:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:30,826 INFO L495 AbstractCegarLoop]: Abstraction has 7114 states and 12150 transitions. [2023-04-01 03:21:30,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:21:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 12150 transitions. [2023-04-01 03:21:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 03:21:30,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:30,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:30,863 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 03:21:31,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 03:21:31,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:31,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash -165278106, now seen corresponding path program 1 times [2023-04-01 03:21:31,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394773718] [2023-04-01 03:21:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:31,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:31,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:31,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394773718] [2023-04-01 03:21:31,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394773718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:31,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:31,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102191807] [2023-04-01 03:21:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:31,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:31,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:31,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:31,587 INFO L87 Difference]: Start difference. First operand 7114 states and 12150 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:32,592 INFO L93 Difference]: Finished difference Result 16768 states and 28701 transitions. [2023-04-01 03:21:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:21:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 181 [2023-04-01 03:21:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:32,639 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 03:21:32,639 INFO L226 Difference]: Without dead ends: 9659 [2023-04-01 03:21:32,652 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 03:21:32,662 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 437 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:32,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 46 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:21:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2023-04-01 03:21:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 9589. [2023-04-01 03:21:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9084 states have (on average 1.5308234258036106) internal successors, (13906), 9465 states have internal predecessors, (13906), 62 states have call successors, (62), 62 states have call predecessors, (62), 442 states have return successors, (2271), 61 states have call predecessors, (2271), 61 states have call successors, (2271) [2023-04-01 03:21:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 16239 transitions. [2023-04-01 03:21:33,096 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 16239 transitions. Word has length 181 [2023-04-01 03:21:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:33,096 INFO L495 AbstractCegarLoop]: Abstraction has 9589 states and 16239 transitions. [2023-04-01 03:21:33,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:21:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 16239 transitions. [2023-04-01 03:21:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-01 03:21:33,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:33,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 03:21:33,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 03:21:33,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:33,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash 271444280, now seen corresponding path program 1 times [2023-04-01 03:21:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:33,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167551301] [2023-04-01 03:21:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:33,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:33,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167551301] [2023-04-01 03:21:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167551301] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:33,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:33,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:33,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224213709] [2023-04-01 03:21:33,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:33,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:33,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:33,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:33,460 INFO L87 Difference]: Start difference. First operand 9589 states and 16239 transitions. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 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 03:21:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:34,393 INFO L93 Difference]: Finished difference Result 24677 states and 44903 transitions. [2023-04-01 03:21:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:21:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 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 186 [2023-04-01 03:21:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:34,451 INFO L225 Difference]: With dead ends: 24677 [2023-04-01 03:21:34,451 INFO L226 Difference]: Without dead ends: 15093 [2023-04-01 03:21:34,473 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 03:21:34,473 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 509 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:34,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 45 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:21:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2023-04-01 03:21:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 14867. [2023-04-01 03:21:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14867 states, 14011 states have (on average 1.4963956891014203) internal successors, (20966), 14679 states have internal predecessors, (20966), 94 states have call successors, (94), 94 states have call predecessors, (94), 761 states have return successors, (4005), 93 states have call predecessors, (4005), 93 states have call successors, (4005) [2023-04-01 03:21:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14867 states to 14867 states and 25065 transitions. [2023-04-01 03:21:34,928 INFO L78 Accepts]: Start accepts. Automaton has 14867 states and 25065 transitions. Word has length 186 [2023-04-01 03:21:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:34,928 INFO L495 AbstractCegarLoop]: Abstraction has 14867 states and 25065 transitions. [2023-04-01 03:21:34,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 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 03:21:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 14867 states and 25065 transitions. [2023-04-01 03:21:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 03:21:34,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:34,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:21:34,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 03:21:34,957 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:34,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1096271292, now seen corresponding path program 1 times [2023-04-01 03:21:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:34,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562762076] [2023-04-01 03:21:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:35,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562762076] [2023-04-01 03:21:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562762076] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:21:35,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265968074] [2023-04-01 03:21:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:35,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:21:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:21:35,780 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 03:21:35,782 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 03:21:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:35,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:21:36,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:21:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 03:21:36,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:21:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265968074] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:36,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:21:36,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 03:21:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850532819] [2023-04-01 03:21:36,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:36,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:21:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:36,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:21:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:21:36,168 INFO L87 Difference]: Start difference. First operand 14867 states and 25065 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 03:21:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:37,028 INFO L93 Difference]: Finished difference Result 41881 states and 73384 transitions. [2023-04-01 03:21:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:21:37,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 192 [2023-04-01 03:21:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:37,163 INFO L225 Difference]: With dead ends: 41881 [2023-04-01 03:21:37,163 INFO L226 Difference]: Without dead ends: 27019 [2023-04-01 03:21:37,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:21:37,209 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:37,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 282 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:21:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27019 states. [2023-04-01 03:21:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27019 to 27019. [2023-04-01 03:21:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27019 states, 25807 states have (on average 1.4691362808540318) internal successors, (37914), 26671 states have internal predecessors, (37914), 174 states have call successors, (174), 174 states have call predecessors, (174), 1037 states have return successors, (8580), 173 states have call predecessors, (8580), 173 states have call successors, (8580) [2023-04-01 03:21:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27019 states to 27019 states and 46668 transitions. [2023-04-01 03:21:38,258 INFO L78 Accepts]: Start accepts. Automaton has 27019 states and 46668 transitions. Word has length 192 [2023-04-01 03:21:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:38,258 INFO L495 AbstractCegarLoop]: Abstraction has 27019 states and 46668 transitions. [2023-04-01 03:21:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 03:21:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27019 states and 46668 transitions. [2023-04-01 03:21:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-01 03:21:38,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:38,335 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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] [2023-04-01 03:21:38,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:21:38,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 03:21:38,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:38,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1857450131, now seen corresponding path program 1 times [2023-04-01 03:21:38,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:38,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124778459] [2023-04-01 03:21:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:38,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:39,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:39,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124778459] [2023-04-01 03:21:39,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124778459] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:21:39,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734678031] [2023-04-01 03:21:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:39,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:21:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:21:39,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:21:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:21:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:39,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:21:39,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:21:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:21:39,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:21:39,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734678031] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:39,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:21:39,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 03:21:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886236875] [2023-04-01 03:21:39,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:21:39,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:21:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:21:39,800 INFO L87 Difference]: Start difference. First operand 27019 states and 46668 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 03:21:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:40,693 INFO L93 Difference]: Finished difference Result 73172 states and 128194 transitions. [2023-04-01 03:21:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:21:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 228 [2023-04-01 03:21:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:41,105 INFO L225 Difference]: With dead ends: 73172 [2023-04-01 03:21:41,106 INFO L226 Difference]: Without dead ends: 46158 [2023-04-01 03:21:41,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:21:41,141 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:41,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 91 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:21:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46158 states. [2023-04-01 03:21:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46158 to 46158. [2023-04-01 03:21:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46158 states, 44457 states have (on average 1.4091819061115234) internal successors, (62648), 45556 states have internal predecessors, (62648), 301 states have call successors, (301), 301 states have call predecessors, (301), 1399 states have return successors, (13825), 300 states have call predecessors, (13825), 300 states have call successors, (13825) [2023-04-01 03:21:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46158 states to 46158 states and 76774 transitions. [2023-04-01 03:21:42,248 INFO L78 Accepts]: Start accepts. Automaton has 46158 states and 76774 transitions. Word has length 228 [2023-04-01 03:21:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:42,248 INFO L495 AbstractCegarLoop]: Abstraction has 46158 states and 76774 transitions. [2023-04-01 03:21:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 03:21:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 46158 states and 76774 transitions. [2023-04-01 03:21:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-01 03:21:42,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:42,531 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-04-01 03:21:42,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:21:42,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:21:42,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:42,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2019942451, now seen corresponding path program 1 times [2023-04-01 03:21:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:42,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870973082] [2023-04-01 03:21:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:42,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:43,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870973082] [2023-04-01 03:21:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870973082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:21:43,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:21:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:21:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926999934] [2023-04-01 03:21:43,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:21:43,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:21:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:21:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:21:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:21:43,787 INFO L87 Difference]: Start difference. First operand 46158 states and 76774 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 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 03:21:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:21:45,190 INFO L93 Difference]: Finished difference Result 94623 states and 157850 transitions. [2023-04-01 03:21:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:21:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 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 235 [2023-04-01 03:21:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:21:45,378 INFO L225 Difference]: With dead ends: 94623 [2023-04-01 03:21:45,378 INFO L226 Difference]: Without dead ends: 48470 [2023-04-01 03:21:45,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:21:45,458 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:21:45,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 45 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:21:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48470 states. [2023-04-01 03:21:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48470 to 48446. [2023-04-01 03:21:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48446 states, 46602 states have (on average 1.4013561649714605) internal successors, (65306), 47816 states have internal predecessors, (65306), 315 states have call successors, (315), 315 states have call predecessors, (315), 1528 states have return successors, (14879), 314 states have call predecessors, (14879), 314 states have call successors, (14879) [2023-04-01 03:21:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48446 states to 48446 states and 80500 transitions. [2023-04-01 03:21:46,940 INFO L78 Accepts]: Start accepts. Automaton has 48446 states and 80500 transitions. Word has length 235 [2023-04-01 03:21:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:21:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 48446 states and 80500 transitions. [2023-04-01 03:21:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 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 03:21:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 48446 states and 80500 transitions. [2023-04-01 03:21:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-01 03:21:47,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:21:47,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-04-01 03:21:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 03:21:47,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:21:47,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:21:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1899273, now seen corresponding path program 1 times [2023-04-01 03:21:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:21:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591621676] [2023-04-01 03:21:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:21:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:48,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:21:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591621676] [2023-04-01 03:21:48,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591621676] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:21:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652638044] [2023-04-01 03:21:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:21:48,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:21:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:21:48,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:21:48,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:21:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:21:48,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:21:48,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:21:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:48,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:21:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:21:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652638044] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:21:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580843706] [2023-04-01 03:21:48,922 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:21:48,922 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:21:48,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:21:48,928 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:21:48,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:21:49,563 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:21:58,513 WARN L223 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)