/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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:23:46,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:23:46,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:23:46,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:23:46,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:23:46,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:23:46,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:23:46,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:23:46,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:23:46,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:23:46,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:23:46,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:23:46,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:23:46,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:23:46,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:23:46,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:23:46,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:23:46,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:23:46,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:23:46,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:23:46,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:23:46,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:23:46,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:23:46,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:23:46,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:23:46,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:23:46,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:23:46,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:23:46,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:23:46,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:23:46,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:23:46,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:23:46,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:23:46,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:23:46,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:23:46,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:23:46,485 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 03:23:46,512 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:23:46,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:23:46,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:23:46,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:23:46,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:23:46,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:23:46,513 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:23:46,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:23:46,514 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:23:46,514 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:23:46,514 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:23:46,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:23:46,515 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:23:46,515 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:23:46,515 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:23:46,515 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:23:46,515 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:23:46,515 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:23:46,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:23:46,516 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:23:46,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:23:46,517 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:23:46,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:23:46,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:23:46,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:23:46,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:23:46,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:23:46,517 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:23:46,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:23:46,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:23:46,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:23:46,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:23:46,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:23:46,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:23:46,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:23:46,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:23:46,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:23:46,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:23:46,740 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:23:46,740 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:23:46,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2023-04-01 03:23:47,940 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:23:48,261 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:23:48,262 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2023-04-01 03:23:48,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f066b45/9411df76d79046578be7e3c26b48d37c/FLAGe3c087065 [2023-04-01 03:23:48,287 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f066b45/9411df76d79046578be7e3c26b48d37c [2023-04-01 03:23:48,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:23:48,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:23:48,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:23:48,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:23:48,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:23:48,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:48,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de1a624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48, skipping insertion in model container [2023-04-01 03:23:48,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:48,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:23:48,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:23:48,743 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_label51.c[59610,59623] [2023-04-01 03:23:48,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:23:48,775 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:23:48,933 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_label51.c[59610,59623] [2023-04-01 03:23:48,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:23:48,973 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:23:48,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48 WrapperNode [2023-04-01 03:23:48,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:23:48,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:23:48,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:23:48,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:23:48,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:23:49,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:23:49,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:23:49,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:23:49,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (1/1) ... [2023-04-01 03:23:49,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:23:49,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:23:49,196 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 03:23:49,197 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 03:23:49,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:23:49,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:23:49,240 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:23:49,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:23:49,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:23:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:23:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:23:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:23:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:23:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:23:49,331 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:23:49,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:23:50,520 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:23:50,696 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:23:50,696 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:23:50,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:23:50 BoogieIcfgContainer [2023-04-01 03:23:50,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:23:50,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:23:50,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:23:50,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:23:50,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:23:48" (1/3) ... [2023-04-01 03:23:50,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b355846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:23:50, skipping insertion in model container [2023-04-01 03:23:50,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:23:48" (2/3) ... [2023-04-01 03:23:50,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b355846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:23:50, skipping insertion in model container [2023-04-01 03:23:50,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:23:50" (3/3) ... [2023-04-01 03:23:50,703 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label51.c [2023-04-01 03:23:50,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:23:50,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:23:50,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:23:50,747 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;@31c081ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:23:50,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:23:50,750 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 03:23:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:23:50,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:50,759 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 03:23:50,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:50,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 597540854, now seen corresponding path program 1 times [2023-04-01 03:23:50,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:50,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071394189] [2023-04-01 03:23:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:50,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:51,586 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 03:23:51,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:51,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071394189] [2023-04-01 03:23:51,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071394189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:51,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:51,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:23:51,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163525600] [2023-04-01 03:23:51,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:51,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:23:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:51,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:23:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:23:51,624 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 03:23:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:52,169 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:23:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:23:52,171 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 03:23:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:52,179 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:23:52,179 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:23:52,182 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 03:23:52,184 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:52,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:23:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:23:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:23:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 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 03:23:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-04-01 03:23:52,241 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-04-01 03:23:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:23:52,244 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-04-01 03:23:52,244 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 03:23:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-04-01 03:23:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 03:23:52,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:52,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:23:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:23:52,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:52,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash 581418897, now seen corresponding path program 1 times [2023-04-01 03:23:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551954402] [2023-04-01 03:23:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:23:52,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551954402] [2023-04-01 03:23:52,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551954402] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:52,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:23:52,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454767054] [2023-04-01 03:23:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:23:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:23:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:23:52,914 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 03:23:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:53,549 INFO L93 Difference]: Finished difference Result 919 states and 1760 transitions. [2023-04-01 03:23:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:23:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-04-01 03:23:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:53,555 INFO L225 Difference]: With dead ends: 919 [2023-04-01 03:23:53,555 INFO L226 Difference]: Without dead ends: 623 [2023-04-01 03:23:53,557 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 03:23:53,557 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 579 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 46 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:23:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-04-01 03:23:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 605. [2023-04-01 03:23:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 588 states have (on average 1.8741496598639455) internal successors, (1102), 593 states have internal predecessors, (1102), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 03:23:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1135 transitions. [2023-04-01 03:23:53,593 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1135 transitions. Word has length 157 [2023-04-01 03:23:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:23:53,593 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1135 transitions. [2023-04-01 03:23:53,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 03:23:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1135 transitions. [2023-04-01 03:23:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 03:23:53,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:53,597 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 03:23:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:23:53,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:53,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash 15715504, now seen corresponding path program 1 times [2023-04-01 03:23:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:53,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31462479] [2023-04-01 03:23:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:53,963 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 03:23:53,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:53,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31462479] [2023-04-01 03:23:53,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31462479] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:53,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:53,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:23:53,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713929681] [2023-04-01 03:23:53,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:23:53,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:23:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:23:53,967 INFO L87 Difference]: Start difference. First operand 605 states and 1135 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 03:23:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:54,320 INFO L93 Difference]: Finished difference Result 1837 states and 3515 transitions. [2023-04-01 03:23:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:23:54,321 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 03:23:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:54,329 INFO L225 Difference]: With dead ends: 1837 [2023-04-01 03:23:54,329 INFO L226 Difference]: Without dead ends: 1237 [2023-04-01 03:23:54,333 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 03:23:54,335 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 774 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:54,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 528 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:23:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2023-04-01 03:23:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1215. [2023-04-01 03:23:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1179 states have (on average 1.8634435962680238) internal successors, (2197), 1195 states have internal predecessors, (2197), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (97), 9 states have call predecessors, (97), 9 states have call successors, (97) [2023-04-01 03:23:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2304 transitions. [2023-04-01 03:23:54,393 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2304 transitions. Word has length 158 [2023-04-01 03:23:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:23:54,394 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 2304 transitions. [2023-04-01 03:23:54,394 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 03:23:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2304 transitions. [2023-04-01 03:23:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 03:23:54,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:54,399 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 03:23:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:23:54,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:54,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -848541739, now seen corresponding path program 1 times [2023-04-01 03:23:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082540415] [2023-04-01 03:23:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:54,666 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 03:23:54,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082540415] [2023-04-01 03:23:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082540415] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:54,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:23:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253589770] [2023-04-01 03:23:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:23:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:23:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:23:54,668 INFO L87 Difference]: Start difference. First operand 1215 states and 2304 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 03:23:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:55,385 INFO L93 Difference]: Finished difference Result 3753 states and 7457 transitions. [2023-04-01 03:23:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:23:55,385 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 03:23:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:55,395 INFO L225 Difference]: With dead ends: 3753 [2023-04-01 03:23:55,395 INFO L226 Difference]: Without dead ends: 2543 [2023-04-01 03:23:55,398 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 03:23:55,398 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:55,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:23:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2023-04-01 03:23:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2495. [2023-04-01 03:23:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2391 states have (on average 1.8046842325386867) internal successors, (4315), 2459 states have internal predecessors, (4315), 18 states have call successors, (18), 18 states have call predecessors, (18), 85 states have return successors, (415), 17 states have call predecessors, (415), 17 states have call successors, (415) [2023-04-01 03:23:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 4748 transitions. [2023-04-01 03:23:55,465 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 4748 transitions. Word has length 161 [2023-04-01 03:23:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:23:55,465 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 4748 transitions. [2023-04-01 03:23:55,465 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 03:23:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 4748 transitions. [2023-04-01 03:23:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 03:23:55,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:55,470 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 03:23:55,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:23:55,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:55,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 973404648, now seen corresponding path program 1 times [2023-04-01 03:23:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:55,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180442035] [2023-04-01 03:23:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:55,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:55,751 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 03:23:55,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180442035] [2023-04-01 03:23:55,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180442035] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:55,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:55,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:23:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308075668] [2023-04-01 03:23:55,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:55,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:23:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:23:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:23:55,753 INFO L87 Difference]: Start difference. First operand 2495 states and 4748 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 03:23:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:56,587 INFO L93 Difference]: Finished difference Result 7623 states and 15471 transitions. [2023-04-01 03:23:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:23:56,588 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 03:23:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:56,611 INFO L225 Difference]: With dead ends: 7623 [2023-04-01 03:23:56,611 INFO L226 Difference]: Without dead ends: 5133 [2023-04-01 03:23:56,618 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 03:23:56,619 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 558 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:56,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 44 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:23:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2023-04-01 03:23:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 5033. [2023-04-01 03:23:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5033 states, 4804 states have (on average 1.6761032472939217) internal successors, (8052), 4965 states have internal predecessors, (8052), 34 states have call successors, (34), 34 states have call predecessors, (34), 194 states have return successors, (1055), 33 states have call predecessors, (1055), 33 states have call successors, (1055) [2023-04-01 03:23:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 9141 transitions. [2023-04-01 03:23:56,820 INFO L78 Accepts]: Start accepts. Automaton has 5033 states and 9141 transitions. Word has length 162 [2023-04-01 03:23:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:23:56,821 INFO L495 AbstractCegarLoop]: Abstraction has 5033 states and 9141 transitions. [2023-04-01 03:23:56,821 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 03:23:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5033 states and 9141 transitions. [2023-04-01 03:23:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 03:23:56,831 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:56,832 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 03:23:56,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 03:23:56,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:56,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1089872817, now seen corresponding path program 1 times [2023-04-01 03:23:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:56,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048045685] [2023-04-01 03:23:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:57,528 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 03:23:57,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:57,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048045685] [2023-04-01 03:23:57,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048045685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:57,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:57,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:23:57,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350478413] [2023-04-01 03:23:57,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:57,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:23:57,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:57,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:23:57,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:23:57,531 INFO L87 Difference]: Start difference. First operand 5033 states and 9141 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 03:23:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:58,377 INFO L93 Difference]: Finished difference Result 12785 states and 24021 transitions. [2023-04-01 03:23:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:23:58,378 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 03:23:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:58,418 INFO L225 Difference]: With dead ends: 12785 [2023-04-01 03:23:58,418 INFO L226 Difference]: Without dead ends: 7757 [2023-04-01 03:23:58,430 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 03:23:58,431 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 489 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 46 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:23:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2023-04-01 03:23:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 7625. [2023-04-01 03:23:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7244 states have (on average 1.6245168415240199) internal successors, (11768), 7525 states have internal predecessors, (11768), 50 states have call successors, (50), 50 states have call predecessors, (50), 330 states have return successors, (1795), 49 states have call predecessors, (1795), 49 states have call successors, (1795) [2023-04-01 03:23:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 13613 transitions. [2023-04-01 03:23:58,662 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 13613 transitions. Word has length 163 [2023-04-01 03:23:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:23:58,662 INFO L495 AbstractCegarLoop]: Abstraction has 7625 states and 13613 transitions. [2023-04-01 03:23:58,662 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 03:23:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 13613 transitions. [2023-04-01 03:23:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-01 03:23:58,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:23:58,709 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 03:23:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 03:23:58,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:23:58,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:23:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1968826812, now seen corresponding path program 1 times [2023-04-01 03:23:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:23:58,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469054485] [2023-04-01 03:23:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:23:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:23:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:23:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:23:58,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:23:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469054485] [2023-04-01 03:23:58,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469054485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:23:58,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:23:58,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:23:58,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370842078] [2023-04-01 03:23:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:23:58,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:23:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:23:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:23:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:23:58,974 INFO L87 Difference]: Start difference. First operand 7625 states and 13613 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 03:23:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:23:59,892 INFO L93 Difference]: Finished difference Result 22826 states and 43935 transitions. [2023-04-01 03:23:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:23:59,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 168 [2023-04-01 03:23:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:23:59,958 INFO L225 Difference]: With dead ends: 22826 [2023-04-01 03:23:59,959 INFO L226 Difference]: Without dead ends: 15206 [2023-04-01 03:23:59,976 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 03:23:59,976 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 495 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:23:59,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 40 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:23:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2023-04-01 03:24:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 15010. [2023-04-01 03:24:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15010 states, 14297 states have (on average 1.4282017206406938) internal successors, (20419), 14816 states have internal predecessors, (20419), 97 states have call successors, (97), 97 states have call predecessors, (97), 615 states have return successors, (3778), 96 states have call predecessors, (3778), 96 states have call successors, (3778) [2023-04-01 03:24:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15010 states to 15010 states and 24294 transitions. [2023-04-01 03:24:00,332 INFO L78 Accepts]: Start accepts. Automaton has 15010 states and 24294 transitions. Word has length 168 [2023-04-01 03:24:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:24:00,333 INFO L495 AbstractCegarLoop]: Abstraction has 15010 states and 24294 transitions. [2023-04-01 03:24:00,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 03:24:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 15010 states and 24294 transitions. [2023-04-01 03:24:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 03:24:00,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:24:00,353 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 03:24:00,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 03:24:00,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:24:00,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:24:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash 153695320, now seen corresponding path program 1 times [2023-04-01 03:24:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:24:00,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742370553] [2023-04-01 03:24:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:24:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:24:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:24:01,956 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 03:24:01,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:24:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742370553] [2023-04-01 03:24:01,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742370553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:24:01,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042996106] [2023-04-01 03:24:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:24:01,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:24:01,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:24:01,974 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 03:24:02,017 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 03:24:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:24:02,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:24:02,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:24:02,442 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 03:24:02,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:24:02,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042996106] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:24:02,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:24:02,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 03:24:02,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039203092] [2023-04-01 03:24:02,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:24:02,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:24:02,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:24:02,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:24:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:24:02,444 INFO L87 Difference]: Start difference. First operand 15010 states and 24294 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 03:24:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:24:03,028 INFO L93 Difference]: Finished difference Result 36733 states and 58183 transitions. [2023-04-01 03:24:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:24:03,029 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 03:24:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:24:03,094 INFO L225 Difference]: With dead ends: 36733 [2023-04-01 03:24:03,094 INFO L226 Difference]: Without dead ends: 21728 [2023-04-01 03:24:03,131 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 03:24:03,133 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:24:03,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 285 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:24:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2023-04-01 03:24:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 20534. [2023-04-01 03:24:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20534 states, 19633 states have (on average 1.3587327458870269) internal successors, (26676), 20268 states have internal predecessors, (26676), 133 states have call successors, (133), 133 states have call predecessors, (133), 767 states have return successors, (4861), 132 states have call predecessors, (4861), 132 states have call successors, (4861) [2023-04-01 03:24:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20534 states to 20534 states and 31670 transitions. [2023-04-01 03:24:03,575 INFO L78 Accepts]: Start accepts. Automaton has 20534 states and 31670 transitions. Word has length 170 [2023-04-01 03:24:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:24:03,576 INFO L495 AbstractCegarLoop]: Abstraction has 20534 states and 31670 transitions. [2023-04-01 03:24:03,576 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 03:24:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20534 states and 31670 transitions. [2023-04-01 03:24:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 03:24:03,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:24:03,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:03,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:24:03,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:24:03,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:24:03,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:24:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2129162287, now seen corresponding path program 1 times [2023-04-01 03:24:03,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:24:03,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103167827] [2023-04-01 03:24:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:24:03,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:24:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:24:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 69 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:24:06,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:24:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103167827] [2023-04-01 03:24:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103167827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:24:06,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777411245] [2023-04-01 03:24:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:24:06,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:24:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:24:06,588 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 03:24:06,590 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 03:24:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:24:06,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:24:06,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:24:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 03:24:06,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:24:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 03:24:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777411245] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:24:07,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000677273] [2023-04-01 03:24:07,041 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:24:07,041 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:24:07,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:24:07,048 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:24:07,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:24:07,632 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:24:15,538 WARN L223 SmtUtils]: Spent 7.02s 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)