/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/Problem06_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:35:00,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:35:00,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:35:00,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 03:35:00,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:35:00,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:35:00,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:35:00,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:35:00,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:35:00,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:35:00,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:35:00,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:35:00,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:35:00,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:35:00,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:35:00,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:35:00,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:35:00,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:35:00,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:35:00,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:35:00,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:35:00,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:35:00,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:35:00,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:35:00,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:35:00,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:35:00,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:35:00,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:35:00,384 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 03:35:00,402 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:35:00,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:35:00,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:35:00,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:35:00,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:35:00,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:35:00,404 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:35:00,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:35:00,405 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:35:00,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:35:00,405 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:35:00,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:35:00,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:35:00,405 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:35:00,406 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:35:00,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:35:00,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:35:00,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:35:00,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:35:00,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:35:00,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:35:00,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:35:00,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:35:00,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:35:00,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:35:00,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:35:00,408 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:35:00,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:35:00,409 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:35:00,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:35:00,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:35:00,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:35:00,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:35:00,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:35:00,410 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:35:00,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:35:00,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:35:00,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:35:00,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:35:00,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:35:00,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:35:00,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:35:00,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:35:00,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:35:00,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:35:00,621 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:35:00,622 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:35:00,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem06_label30.c [2023-04-01 03:35:01,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:35:02,453 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:35:02,454 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem06_label30.c [2023-04-01 03:35:02,502 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9f78b61/ebb2fb654ba347d79d2f269ab1f56ba4/FLAG8f6fc98bc [2023-04-01 03:35:02,520 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9f78b61/ebb2fb654ba347d79d2f269ab1f56ba4 [2023-04-01 03:35:02,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:35:02,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:35:02,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:35:02,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:35:02,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:35:02,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:35:02" (1/1) ... [2023-04-01 03:35:02,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24086318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:02, skipping insertion in model container [2023-04-01 03:35:02,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:35:02" (1/1) ... [2023-04-01 03:35:02,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:35:02,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:35:04,242 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/Problem06_label30.c[334048,334061] [2023-04-01 03:35:04,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:35:04,274 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:35:04,958 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/Problem06_label30.c[334048,334061] [2023-04-01 03:35:04,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:35:05,002 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:35:05,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05 WrapperNode [2023-04-01 03:35:05,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:35:05,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:35:05,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:35:05,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:35:05,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,539 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:35:05,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:35:05,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:35:05,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:35:05,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (1/1) ... [2023-04-01 03:35:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:35:05,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:35:05,666 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 03:35:05,676 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 03:35:05,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 03:35:05,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:35:05,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:35:05,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:35:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:35:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:35:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:35:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:35:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:35:05,857 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:35:05,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:35:11,469 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:35:12,392 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:35:12,392 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:35:12,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:35:12 BoogieIcfgContainer [2023-04-01 03:35:12,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:35:12,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:35:12,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:35:12,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:35:12,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:35:02" (1/3) ... [2023-04-01 03:35:12,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed6ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:35:12, skipping insertion in model container [2023-04-01 03:35:12,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:35:05" (2/3) ... [2023-04-01 03:35:12,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed6ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:35:12, skipping insertion in model container [2023-04-01 03:35:12,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:35:12" (3/3) ... [2023-04-01 03:35:12,408 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem06_label30.c [2023-04-01 03:35:12,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:35:12,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:35:12,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:35:12,557 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;@49978298, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:35:12,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:35:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 964 states, 948 states have (on average 1.978902953586498) internal successors, (1876), 949 states have internal predecessors, (1876), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 03:35:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2023-04-01 03:35:12,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:35:12,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:35:12,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:35:12,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:35:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash 22930251, now seen corresponding path program 1 times [2023-04-01 03:35:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:35:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785203352] [2023-04-01 03:35:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:35:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:35:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:35:18,371 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 03:35:18,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:35:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785203352] [2023-04-01 03:35:18,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785203352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:35:18,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:35:18,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:35:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453974071] [2023-04-01 03:35:18,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:35:18,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:35:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:35:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:35:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:35:18,419 INFO L87 Difference]: Start difference. First operand has 964 states, 948 states have (on average 1.978902953586498) internal successors, (1876), 949 states have internal predecessors, (1876), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 2 states have internal predecessors, (935), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:35:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:35:22,208 INFO L93 Difference]: Finished difference Result 2880 states and 5678 transitions. [2023-04-01 03:35:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:35:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 2 states have internal predecessors, (935), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 943 [2023-04-01 03:35:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:35:22,245 INFO L225 Difference]: With dead ends: 2880 [2023-04-01 03:35:22,245 INFO L226 Difference]: Without dead ends: 1913 [2023-04-01 03:35:22,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 03:35:22,257 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 180 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:35:22,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 471 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 2982 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 03:35:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2023-04-01 03:35:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1913. [2023-04-01 03:35:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1889 states have (on average 1.7358390682901006) internal successors, (3279), 1889 states have internal predecessors, (3279), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2023-04-01 03:35:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3312 transitions. [2023-04-01 03:35:22,358 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3312 transitions. Word has length 943 [2023-04-01 03:35:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:35:22,360 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3312 transitions. [2023-04-01 03:35:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 2 states have internal predecessors, (935), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:35:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3312 transitions. [2023-04-01 03:35:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2023-04-01 03:35:22,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:35:22,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:35:22,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:35:22,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:35:22,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:35:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 822151620, now seen corresponding path program 1 times [2023-04-01 03:35:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:35:22,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155977887] [2023-04-01 03:35:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:35:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:35:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:35:24,588 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 03:35:24,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:35:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155977887] [2023-04-01 03:35:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155977887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:35:24,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:35:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:35:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459160205] [2023-04-01 03:35:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:35:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:35:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:35:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:35:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:35:24,595 INFO L87 Difference]: Start difference. First operand 1913 states and 3312 transitions. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 4 states have internal predecessors, (945), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:35:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:35:29,770 INFO L93 Difference]: Finished difference Result 5863 states and 10171 transitions. [2023-04-01 03:35:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:35:29,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 4 states have internal predecessors, (945), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 955 [2023-04-01 03:35:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:35:29,791 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 03:35:29,792 INFO L226 Difference]: Without dead ends: 3955 [2023-04-01 03:35:29,798 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 03:35:29,799 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 3667 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 5326 mSolverCounterSat, 1750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3667 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 7076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1750 IncrementalHoareTripleChecker+Valid, 5326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 03:35:29,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3667 Valid, 186 Invalid, 7076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1750 Valid, 5326 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 03:35:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2023-04-01 03:35:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3876. [2023-04-01 03:35:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3876 states, 3811 states have (on average 1.564156389399108) internal successors, (5961), 3817 states have internal predecessors, (5961), 22 states have call successors, (22), 22 states have call predecessors, (22), 42 states have return successors, (117), 36 states have call predecessors, (117), 21 states have call successors, (117) [2023-04-01 03:35:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 6100 transitions. [2023-04-01 03:35:29,918 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 6100 transitions. Word has length 955 [2023-04-01 03:35:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:35:29,919 INFO L495 AbstractCegarLoop]: Abstraction has 3876 states and 6100 transitions. [2023-04-01 03:35:29,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 4 states have internal predecessors, (945), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:35:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 6100 transitions. [2023-04-01 03:35:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2023-04-01 03:35:29,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:35:29,940 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:35:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:35:29,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:35:29,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:35:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 814282413, now seen corresponding path program 1 times [2023-04-01 03:35:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:35:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92119715] [2023-04-01 03:35:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:35:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:35:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:35:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:35:31,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:35:31,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92119715] [2023-04-01 03:35:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92119715] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:35:31,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:35:31,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:35:31,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598979215] [2023-04-01 03:35:31,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:35:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:35:31,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:35:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:35:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:35:31,781 INFO L87 Difference]: Start difference. First operand 3876 states and 6100 transitions. Second operand has 5 states, 5 states have (on average 190.6) internal successors, (953), 4 states have internal predecessors, (953), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:35:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:35:36,070 INFO L93 Difference]: Finished difference Result 12082 states and 19398 transitions. [2023-04-01 03:35:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:35:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 4 states have internal predecessors, (953), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 963 [2023-04-01 03:35:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:35:36,110 INFO L225 Difference]: With dead ends: 12082 [2023-04-01 03:35:36,110 INFO L226 Difference]: Without dead ends: 8211 [2023-04-01 03:35:36,121 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 03:35:36,123 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3349 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 5658 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3349 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 6860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 5658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:35:36,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3349 Valid, 192 Invalid, 6860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 5658 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 03:35:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2023-04-01 03:35:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 7981. [2023-04-01 03:35:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7769 states have (on average 1.4209035911957781) internal successors, (11039), 7803 states have internal predecessors, (11039), 42 states have call successors, (42), 42 states have call predecessors, (42), 169 states have return successors, (641), 135 states have call predecessors, (641), 41 states have call successors, (641) [2023-04-01 03:35:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11722 transitions. [2023-04-01 03:35:36,389 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11722 transitions. Word has length 963 [2023-04-01 03:35:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:35:36,389 INFO L495 AbstractCegarLoop]: Abstraction has 7981 states and 11722 transitions. [2023-04-01 03:35:36,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 4 states have internal predecessors, (953), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:35:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11722 transitions. [2023-04-01 03:35:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2023-04-01 03:35:36,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:35:36,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:35:36,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:35:36,434 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:35:36,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:35:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1792579830, now seen corresponding path program 1 times [2023-04-01 03:35:36,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:35:36,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162290316] [2023-04-01 03:35:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:35:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:35:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:35:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:35:37,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:35:37,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162290316] [2023-04-01 03:35:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162290316] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:35:37,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:35:37,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:35:37,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061813683] [2023-04-01 03:35:37,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:35:37,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:35:37,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:35:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:35:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:35:37,800 INFO L87 Difference]: Start difference. First operand 7981 states and 11722 transitions. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 4 states have internal predecessors, (960), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:35:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:35:42,280 INFO L93 Difference]: Finished difference Result 24975 states and 38493 transitions. [2023-04-01 03:35:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:35:42,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 4 states have internal predecessors, (960), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 970 [2023-04-01 03:35:42,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:35:42,378 INFO L225 Difference]: With dead ends: 24975 [2023-04-01 03:35:42,379 INFO L226 Difference]: Without dead ends: 16999 [2023-04-01 03:35:42,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:35:42,413 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 3767 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5419 mSolverCounterSat, 1468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3767 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1468 IncrementalHoareTripleChecker+Valid, 5419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:35:42,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3767 Valid, 185 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1468 Valid, 5419 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 03:35:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16999 states. [2023-04-01 03:35:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16999 to 16720. [2023-04-01 03:35:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16720 states, 16016 states have (on average 1.3316683316683318) internal successors, (21328), 16171 states have internal predecessors, (21328), 82 states have call successors, (82), 82 states have call predecessors, (82), 621 states have return successors, (2754), 466 states have call predecessors, (2754), 81 states have call successors, (2754) [2023-04-01 03:35:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16720 states to 16720 states and 24164 transitions. [2023-04-01 03:35:42,880 INFO L78 Accepts]: Start accepts. Automaton has 16720 states and 24164 transitions. Word has length 970 [2023-04-01 03:35:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:35:42,881 INFO L495 AbstractCegarLoop]: Abstraction has 16720 states and 24164 transitions. [2023-04-01 03:35:42,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 4 states have internal predecessors, (960), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:35:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16720 states and 24164 transitions. [2023-04-01 03:35:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2023-04-01 03:35:42,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:35:42,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:35:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:35:42,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:35:42,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:35:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1876001761, now seen corresponding path program 1 times [2023-04-01 03:35:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:35:42,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541040942] [2023-04-01 03:35:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:35:42,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:35:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:35:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 03:35:46,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:35:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541040942] [2023-04-01 03:35:46,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541040942] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:35:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746625545] [2023-04-01 03:35:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:35:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:35:46,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:35:46,249 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 03:35:46,251 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 03:35:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:35:46,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:35:46,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:35:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:35:47,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:35:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:35:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746625545] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:35:47,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744260526] [2023-04-01 03:35:47,319 INFO L159 IcfgInterpreter]: Started Sifa with 947 locations of interest [2023-04-01 03:35:47,319 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:35:47,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:35:47,329 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:35:47,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:35:48,142 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 166 for LOIs