/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem17_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:24:26,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:24:26,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:24:26,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:24:26,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:24:26,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:24:26,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:24:26,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:24:26,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:24:26,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:24:26,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:24:26,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:24:26,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:24:26,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:24:26,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:24:26,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:24:26,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:24:26,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:24:26,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:24:26,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:24:26,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:24:26,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:24:26,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:24:26,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:24:26,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:24:26,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:24:26,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:24:26,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:24:26,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:24:26,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:24:26,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:24:26,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:24:26,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:24:26,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:24:26,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:24:26,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:24:26,807 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 10:24:26,820 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:24:26,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:24:26,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:24:26,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:24:26,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:24:26,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:24:26,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:24:26,822 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:24:26,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:24:26,823 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:24:26,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:24:26,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:24:26,823 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:24:26,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:24:26,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:24:26,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:24:26,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:24:26,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:24:26,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:24:26,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:24:26,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:24:27,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:24:27,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:24:27,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:24:27,026 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:24:27,027 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:24:27,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label10.c [2023-04-01 10:24:28,024 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:24:28,281 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:24:28,281 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label10.c [2023-04-01 10:24:28,297 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db727fa6f/8d5f90685a844a318f76568539e061fe/FLAG44fbd2394 [2023-04-01 10:24:28,312 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db727fa6f/8d5f90685a844a318f76568539e061fe [2023-04-01 10:24:28,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:24:28,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:24:28,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:24:28,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:24:28,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:24:28,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:24:28" (1/1) ... [2023-04-01 10:24:28,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65331155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:28, skipping insertion in model container [2023-04-01 10:24:28,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:24:28" (1/1) ... [2023-04-01 10:24:28,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:24:28,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:24:28,550 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/Problem17_label10.c[5916,5929] [2023-04-01 10:24:28,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:24:28,994 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:24:29,006 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/Problem17_label10.c[5916,5929] [2023-04-01 10:24:29,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:24:29,171 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:24:29,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29 WrapperNode [2023-04-01 10:24:29,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:24:29,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:24:29,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:24:29,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:24:29,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,346 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:24:29,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:24:29,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:24:29,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:24:29,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (1/1) ... [2023-04-01 10:24:29,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:24:29,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:24:29,422 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 10:24:29,471 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 10:24:29,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:24:29,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:24:29,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:24:29,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:24:29,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:24:29,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:24:29,496 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:24:29,496 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:24:29,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:24:29,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:24:29,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:24:29,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:24:29,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:24:29,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:24:29,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:24:29,546 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:24:29,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:24:31,951 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:24:40,393 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:24:40,393 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:24:40,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:24:40 BoogieIcfgContainer [2023-04-01 10:24:40,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:24:40,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:24:40,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:24:40,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:24:40,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:24:28" (1/3) ... [2023-04-01 10:24:40,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4833d0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:24:40, skipping insertion in model container [2023-04-01 10:24:40,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:24:29" (2/3) ... [2023-04-01 10:24:40,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4833d0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:24:40, skipping insertion in model container [2023-04-01 10:24:40,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:24:40" (3/3) ... [2023-04-01 10:24:40,401 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label10.c [2023-04-01 10:24:40,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:24:40,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:24:40,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:24:40,452 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;@51a72c32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:24:40,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:24:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:24:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:24:40,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:24:40,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:24:40,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:24:40,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:24:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2084310295, now seen corresponding path program 1 times [2023-04-01 10:24:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:24:40,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200938379] [2023-04-01 10:24:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:24:40,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:24:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:24:40,710 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 10:24:40,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:24:40,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200938379] [2023-04-01 10:24:40,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200938379] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:24:40,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:24:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:24:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966686256] [2023-04-01 10:24:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:24:40,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:24:40,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:24:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:24:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:24:40,744 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:24:44,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:24:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:24:44,312 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:24:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:24:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:24:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:24:44,327 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:24:44,327 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:24:44,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:24:44,332 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 216 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:24:44,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 85 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 757 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 10:24:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:24:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 466. [2023-04-01 10:24:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 456 states have (on average 1.8421052631578947) internal successors, (840), 456 states have internal predecessors, (840), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:24:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 851 transitions. [2023-04-01 10:24:44,422 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 851 transitions. Word has length 11 [2023-04-01 10:24:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:24:44,423 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 851 transitions. [2023-04-01 10:24:44,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:24:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 851 transitions. [2023-04-01 10:24:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:24:44,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:24:44,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:24:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:24:44,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:24:44,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:24:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2065754255, now seen corresponding path program 1 times [2023-04-01 10:24:44,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:24:44,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281377170] [2023-04-01 10:24:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:24:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:24:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:24:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:24:44,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:24:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281377170] [2023-04-01 10:24:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281377170] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:24:44,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:24:44,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:24:44,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401254517] [2023-04-01 10:24:44,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:24:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:24:44,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:24:44,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:24:44,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:24:44,530 INFO L87 Difference]: Start difference. First operand 466 states and 851 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:24:48,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:24:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:24:48,146 INFO L93 Difference]: Finished difference Result 1404 states and 2591 transitions. [2023-04-01 10:24:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:24:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 10:24:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:24:48,151 INFO L225 Difference]: With dead ends: 1404 [2023-04-01 10:24:48,152 INFO L226 Difference]: Without dead ends: 943 [2023-04-01 10:24:48,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:24:48,156 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 733 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:24:48,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 49 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1373 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 10:24:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-04-01 10:24:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 914. [2023-04-01 10:24:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 896 states have (on average 1.5524553571428572) internal successors, (1391), 900 states have internal predecessors, (1391), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-01 10:24:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1422 transitions. [2023-04-01 10:24:48,219 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1422 transitions. Word has length 21 [2023-04-01 10:24:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:24:48,219 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1422 transitions. [2023-04-01 10:24:48,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:24:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1422 transitions. [2023-04-01 10:24:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:24:48,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:24:48,220 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] [2023-04-01 10:24:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:24:48,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:24:48,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:24:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash 405280157, now seen corresponding path program 1 times [2023-04-01 10:24:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:24:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803562959] [2023-04-01 10:24:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:24:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:24:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:24:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:24:48,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:24:48,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803562959] [2023-04-01 10:24:48,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803562959] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:24:48,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:24:48,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:24:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764119179] [2023-04-01 10:24:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:24:48,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:24:48,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:24:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:24:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:24:48,318 INFO L87 Difference]: Start difference. First operand 914 states and 1422 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) [2023-04-01 10:24:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:24:50,081 INFO L93 Difference]: Finished difference Result 2783 states and 4387 transitions. [2023-04-01 10:24:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:24:50,082 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 [2023-04-01 10:24:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:24:50,091 INFO L225 Difference]: With dead ends: 2783 [2023-04-01 10:24:50,091 INFO L226 Difference]: Without dead ends: 1874 [2023-04-01 10:24:50,094 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 10:24:50,096 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 716 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:24:50,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 55 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 10:24:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2023-04-01 10:24:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1201. [2023-04-01 10:24:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1163 states have (on average 1.4299226139294927) internal successors, (1663), 1181 states have internal predecessors, (1663), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (70), 9 states have call predecessors, (70), 9 states have call successors, (70) [2023-04-01 10:24:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1743 transitions. [2023-04-01 10:24:50,138 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1743 transitions. Word has length 31 [2023-04-01 10:24:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:24:50,139 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1743 transitions. [2023-04-01 10:24:50,139 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) [2023-04-01 10:24:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1743 transitions. [2023-04-01 10:24:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 10:24:50,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:24:50,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:24:50,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:24:50,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:24:50,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:24:50,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1036222101, now seen corresponding path program 1 times [2023-04-01 10:24:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:24:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136613724] [2023-04-01 10:24:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:24:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:24:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:24:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:24:50,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:24:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136613724] [2023-04-01 10:24:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136613724] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:24:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295350540] [2023-04-01 10:24:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:24:50,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:24:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:24:50,338 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 10:24:50,351 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 10:24:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:24:50,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:24:50,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:24:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:24:50,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:24:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:24:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295350540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:24:50,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869798794] [2023-04-01 10:24:50,612 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 10:24:50,612 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:24:50,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:24:50,617 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:24:50,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:24:50,852 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 82 for LOIs [2023-04-01 10:24:51,158 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-04-01 10:24:51,920 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24076 conjuctions. This might take some time... [2023-04-01 10:24:52,887 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 550 conjuctions. [2023-04-01 10:25:05,837 WARN L223 SmtUtils]: Spent 7.96s on a formula simplification that was a NOOP. DAG size: 999 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)