/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:14:25,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:14:25,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:14:25,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:14:25,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:14:25,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:14:25,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:14:25,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:14:25,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:14:25,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:14:25,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:14:25,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:14:25,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:14:25,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:14:25,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:14:25,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:14:25,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:14:25,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:14:25,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:14:25,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:14:25,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:14:25,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:14:25,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:14:25,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:14:25,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:14:25,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:14:25,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:14:25,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:14:25,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:14:25,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:14:25,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:14:25,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:14:25,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:14:25,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:14:25,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:14:25,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:14:25,425 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 [2023-03-31 22:14:25,451 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:14:25,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:14:25,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:14:25,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:14:25,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:14:25,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:14:25,453 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:14:25,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:14:25,453 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:14:25,453 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:14:25,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:14:25,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:14:25,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:14:25,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:14:25,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:14:25,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:14:25,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:14:25,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:14:25,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:14:25,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:14:25,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:14:25,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:14:25,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:14:25,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:14:25,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:14:25,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:14:25,640 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:14:25,640 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:14:25,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label56.c [2023-03-31 22:14:26,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:14:26,913 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:14:26,914 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label56.c [2023-03-31 22:14:26,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c2ef4c9/023e296fac4d456c8e52f796cfe93f2f/FLAG9bfa1503b [2023-03-31 22:14:26,935 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c2ef4c9/023e296fac4d456c8e52f796cfe93f2f [2023-03-31 22:14:26,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:14:26,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:14:26,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:14:26,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:14:26,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:14:26,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:14:26" (1/1) ... [2023-03-31 22:14:26,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c4c6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:26, skipping insertion in model container [2023-03-31 22:14:26,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:14:26" (1/1) ... [2023-03-31 22:14:26,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:14:27,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:14:27,126 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label56.c[4182,4195] [2023-03-31 22:14:27,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:14:27,500 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:14:27,523 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label56.c[4182,4195] [2023-03-31 22:14:27,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:14:27,699 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:14:27,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27 WrapperNode [2023-03-31 22:14:27,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:14:27,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:14:27,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:14:27,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:14:27,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:14:27,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:14:27,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:14:27,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:14:27,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (1/1) ... [2023-03-31 22:14:27,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:14:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:14:27,854 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) [2023-03-31 22:14:27,869 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 [2023-03-31 22:14:27,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:14:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:14:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:14:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:14:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:14:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:14:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:14:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:14:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:14:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:14:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:14:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:14:27,932 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:14:27,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:14:29,527 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:14:29,996 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:14:29,996 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:14:30,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:14:30 BoogieIcfgContainer [2023-03-31 22:14:30,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:14:30,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:14:30,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:14:30,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:14:30,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:14:26" (1/3) ... [2023-03-31 22:14:30,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba47b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:14:30, skipping insertion in model container [2023-03-31 22:14:30,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:27" (2/3) ... [2023-03-31 22:14:30,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba47b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:14:30, skipping insertion in model container [2023-03-31 22:14:30,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:14:30" (3/3) ... [2023-03-31 22:14:30,006 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label56.c [2023-03-31 22:14:30,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:14:30,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:14:30,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:14:30,072 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;@fcfa181, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:14:30,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:14:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:14:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:14:30,082 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:30,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:30,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:30,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 271516611, now seen corresponding path program 1 times [2023-03-31 22:14:30,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:30,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87260748] [2023-03-31 22:14:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:30,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:30,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87260748] [2023-03-31 22:14:30,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87260748] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:30,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:14:30,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229786022] [2023-03-31 22:14:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:30,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:14:30,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:14:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:30,374 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:14:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:31,500 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-03-31 22:14:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:14:31,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:14:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:31,511 INFO L225 Difference]: With dead ends: 720 [2023-03-31 22:14:31,512 INFO L226 Difference]: Without dead ends: 473 [2023-03-31 22:14:31,515 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 [2023-03-31 22:14:31,517 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:31,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:14:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-03-31 22:14:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-03-31 22:14:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-31 22:14:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-03-31 22:14:31,585 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-03-31 22:14:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:31,585 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-03-31 22:14:31,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:14:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-03-31 22:14:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 22:14:31,586 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:31,586 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:31,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:14:31,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:31,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1627330926, now seen corresponding path program 1 times [2023-03-31 22:14:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:31,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758254501] [2023-03-31 22:14:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:31,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758254501] [2023-03-31 22:14:31,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758254501] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:31,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:31,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:14:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570777548] [2023-03-31 22:14:31,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:31,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:14:31,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:31,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:14:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:14:31,727 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:34,214 INFO L93 Difference]: Finished difference Result 1428 states and 2282 transitions. [2023-03-31 22:14:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:14:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-03-31 22:14:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:34,218 INFO L225 Difference]: With dead ends: 1428 [2023-03-31 22:14:34,219 INFO L226 Difference]: Without dead ends: 960 [2023-03-31 22:14:34,219 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 [2023-03-31 22:14:34,220 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 672 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:34,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 58 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-03-31 22:14:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-03-31 22:14:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 940. [2023-03-31 22:14:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.4912663755458515) internal successors, (1366), 924 states have internal predecessors, (1366), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-03-31 22:14:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1406 transitions. [2023-03-31 22:14:34,275 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1406 transitions. Word has length 31 [2023-03-31 22:14:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:34,276 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1406 transitions. [2023-03-31 22:14:34,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:34,276 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1406 transitions. [2023-03-31 22:14:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 22:14:34,277 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:34,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:34,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:14:34,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:34,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash 319662474, now seen corresponding path program 1 times [2023-03-31 22:14:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:34,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007848540] [2023-03-31 22:14:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:34,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:34,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007848540] [2023-03-31 22:14:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007848540] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:34,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:34,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:14:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341665357] [2023-03-31 22:14:34,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:14:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:14:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:14:34,427 INFO L87 Difference]: Start difference. First operand 940 states and 1406 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:36,079 INFO L93 Difference]: Finished difference Result 2858 states and 4368 transitions. [2023-03-31 22:14:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:14:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-03-31 22:14:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:36,089 INFO L225 Difference]: With dead ends: 2858 [2023-03-31 22:14:36,089 INFO L226 Difference]: Without dead ends: 1923 [2023-03-31 22:14:36,095 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 [2023-03-31 22:14:36,097 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:36,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:14:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-03-31 22:14:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-03-31 22:14:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3422029702970297) internal successors, (2169), 1640 states have internal predecessors, (2169), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-03-31 22:14:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2264 transitions. [2023-03-31 22:14:36,148 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2264 transitions. Word has length 35 [2023-03-31 22:14:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:36,148 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2264 transitions. [2023-03-31 22:14:36,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2264 transitions. [2023-03-31 22:14:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 22:14:36,155 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:36,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:14:36,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:36,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash -762409493, now seen corresponding path program 1 times [2023-03-31 22:14:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916990582] [2023-03-31 22:14:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:36,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:36,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:36,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916990582] [2023-03-31 22:14:36,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916990582] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:36,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:36,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:14:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83275686] [2023-03-31 22:14:36,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:36,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:14:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:14:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:36,432 INFO L87 Difference]: Start difference. First operand 1666 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:14:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:37,632 INFO L93 Difference]: Finished difference Result 4256 states and 5999 transitions. [2023-03-31 22:14:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:14:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-03-31 22:14:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:37,658 INFO L225 Difference]: With dead ends: 4256 [2023-03-31 22:14:37,658 INFO L226 Difference]: Without dead ends: 2595 [2023-03-31 22:14:37,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:37,669 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:37,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:14:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-03-31 22:14:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-03-31 22:14:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.2676458588331294) internal successors, (3107), 2479 states have internal predecessors, (3107), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-03-31 22:14:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3266 transitions. [2023-03-31 22:14:37,787 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3266 transitions. Word has length 152 [2023-03-31 22:14:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:37,790 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3266 transitions. [2023-03-31 22:14:37,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:14:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3266 transitions. [2023-03-31 22:14:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-03-31 22:14:37,796 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:37,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:14:37,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:37,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2026698270, now seen corresponding path program 1 times [2023-03-31 22:14:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:37,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338895294] [2023-03-31 22:14:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:37,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:38,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:38,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338895294] [2023-03-31 22:14:38,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338895294] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:38,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:38,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:14:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055916700] [2023-03-31 22:14:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:14:38,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:14:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:38,116 INFO L87 Difference]: Start difference. First operand 2513 states and 3266 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:14:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:39,969 INFO L93 Difference]: Finished difference Result 5948 states and 8028 transitions. [2023-03-31 22:14:39,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:14:39,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 226 [2023-03-31 22:14:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:39,980 INFO L225 Difference]: With dead ends: 5948 [2023-03-31 22:14:39,981 INFO L226 Difference]: Without dead ends: 3440 [2023-03-31 22:14:39,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:39,985 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 223 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:39,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 455 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:14:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2023-03-31 22:14:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3170. [2023-03-31 22:14:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3096 states have (on average 1.2512919896640826) internal successors, (3874), 3128 states have internal predecessors, (3874), 21 states have call successors, (21), 21 states have call predecessors, (21), 52 states have return successors, (215), 20 states have call predecessors, (215), 20 states have call successors, (215) [2023-03-31 22:14:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4110 transitions. [2023-03-31 22:14:40,038 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4110 transitions. Word has length 226 [2023-03-31 22:14:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:40,039 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 4110 transitions. [2023-03-31 22:14:40,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:14:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4110 transitions. [2023-03-31 22:14:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-03-31 22:14:40,040 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:40,041 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:40,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:14:40,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:40,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1469640741, now seen corresponding path program 1 times [2023-03-31 22:14:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:40,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218153845] [2023-03-31 22:14:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:40,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:14:40,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:40,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218153845] [2023-03-31 22:14:40,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218153845] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:14:40,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670343103] [2023-03-31 22:14:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:40,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:14:40,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:14:40,470 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) [2023-03-31 22:14:40,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:14:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:40,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:14:40,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:14:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:14:40,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:14:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:14:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670343103] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:14:40,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812252365] [2023-03-31 22:14:40,863 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:14:40,863 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:14:40,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:14:40,869 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:14:40,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:14:40,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:14:41,190 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2023-03-31 22:14:41,362 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5316 conjuctions. This might take some time... [2023-03-31 22:14:41,430 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 142 conjuctions. [2023-03-31 22:14:41,509 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2023-03-31 22:14:41,676 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8883 conjuctions. This might take some time... [2023-03-31 22:14:41,823 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 176 conjuctions. [2023-03-31 22:14:42,758 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:14:42,809 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2023-03-31 22:14:42,945 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5316 conjuctions. This might take some time... [2023-03-31 22:14:43,121 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 142 conjuctions. [2023-03-31 22:15:04,250 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34