/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:01:57,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:01:57,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:01:57,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:01:57,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:01:57,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:01:57,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:01:57,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:01:57,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:01:57,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:01:57,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:01:57,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:01:57,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:01:57,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:01:57,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:01:57,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:01:57,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:01:57,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:01:57,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:01:57,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:01:57,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:01:57,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:01:57,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:01:57,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:01:57,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:01:57,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:01:57,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:01:57,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:01:57,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:01:57,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:01:57,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:01:57,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:01:57,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:01:57,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:01:57,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:01:57,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:01:57,664 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 05:01:57,691 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:01:57,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:01:57,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:01:57,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:01:57,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:01:57,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:01:57,693 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:01:57,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:01:57,693 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:01:57,693 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:01:57,694 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:01:57,694 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:01:57,694 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:01:57,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:01:57,694 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:01:57,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:01:57,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:01:57,695 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:01:57,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:01:57,695 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:01:57,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:01:57,697 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:01:57,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:01:57,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:01:57,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:01:57,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:01:57,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:01:57,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:01:57,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:01:57,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:01:57,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:01:57,963 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:01:57,963 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:01:57,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i [2023-04-01 05:01:59,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:01:59,233 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:01:59,234 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i [2023-04-01 05:01:59,239 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4bec2eb/f61fc4464eaf412aae7242ad6e8620f9/FLAGdfc955288 [2023-04-01 05:01:59,255 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a4bec2eb/f61fc4464eaf412aae7242ad6e8620f9 [2023-04-01 05:01:59,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:01:59,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:01:59,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:01:59,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:01:59,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:01:59,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d07ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59, skipping insertion in model container [2023-04-01 05:01:59,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:01:59,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:01:59,385 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/loop-invgen/SpamAssassin-loop.i[893,906] [2023-04-01 05:01:59,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:01:59,406 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:01:59,415 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/loop-invgen/SpamAssassin-loop.i[893,906] [2023-04-01 05:01:59,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:01:59,432 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:01:59,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59 WrapperNode [2023-04-01 05:01:59,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:01:59,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:01:59,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:01:59,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:01:59,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:01:59,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:01:59,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:01:59,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:01:59,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (1/1) ... [2023-04-01 05:01:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:01:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:01:59,491 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 05:01:59,497 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 05:01:59,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:01:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:01:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:01:59,530 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:01:59,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:01:59,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:01:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:01:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:01:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:01:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:01:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:01:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:01:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:01:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:01:59,640 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:01:59,644 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:01:59,855 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:01:59,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:01:59,889 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 05:01:59,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:01:59 BoogieIcfgContainer [2023-04-01 05:01:59,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:01:59,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:01:59,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:01:59,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:01:59,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:01:59" (1/3) ... [2023-04-01 05:01:59,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b005cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:01:59, skipping insertion in model container [2023-04-01 05:01:59,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:01:59" (2/3) ... [2023-04-01 05:01:59,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b005cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:01:59, skipping insertion in model container [2023-04-01 05:01:59,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:01:59" (3/3) ... [2023-04-01 05:01:59,909 INFO L112 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2023-04-01 05:01:59,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:01:59,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:01:59,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:02:00,005 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;@3cced929, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:02:00,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:02:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 05:02:00,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:00,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:02:00,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:00,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash -380036565, now seen corresponding path program 1 times [2023-04-01 05:02:00,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:00,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804387613] [2023-04-01 05:02:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:00,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:00,327 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 05:02:00,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:00,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804387613] [2023-04-01 05:02:00,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804387613] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:00,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:00,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:02:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828409777] [2023-04-01 05:02:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:00,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:02:00,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:02:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:02:00,371 INFO L87 Difference]: Start difference. First operand has 41 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 05:02:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:00,507 INFO L93 Difference]: Finished difference Result 85 states and 148 transitions. [2023-04-01 05:02:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:02:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2023-04-01 05:02:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:00,521 INFO L225 Difference]: With dead ends: 85 [2023-04-01 05:02:00,522 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 05:02:00,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:02:00,528 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:00,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 181 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 05:02:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-04-01 05:02:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2023-04-01 05:02:00,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2023-04-01 05:02:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:00,571 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2023-04-01 05:02:00,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 05:02:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2023-04-01 05:02:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 05:02:00,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:00,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:02:00,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:02:00,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:00,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash -358080598, now seen corresponding path program 1 times [2023-04-01 05:02:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:00,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515146044] [2023-04-01 05:02:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:00,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:00,656 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 05:02:00,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:00,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515146044] [2023-04-01 05:02:00,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515146044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:00,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:00,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:02:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381184797] [2023-04-01 05:02:00,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:00,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:02:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:02:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:02:00,660 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 05:02:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:00,731 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-04-01 05:02:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:02:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2023-04-01 05:02:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:00,734 INFO L225 Difference]: With dead ends: 54 [2023-04-01 05:02:00,734 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 05:02:00,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:02:00,735 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:00,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 136 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 05:02:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-04-01 05:02:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-04-01 05:02:00,748 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2023-04-01 05:02:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:00,748 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-04-01 05:02:00,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 05:02:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-04-01 05:02:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 05:02:00,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:00,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:02:00,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:02:00,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:00,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:00,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1006109912, now seen corresponding path program 1 times [2023-04-01 05:02:00,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:00,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159672930] [2023-04-01 05:02:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:00,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:02:00,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:00,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159672930] [2023-04-01 05:02:00,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159672930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:02:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828245557] [2023-04-01 05:02:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:02:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:02:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:02:00,894 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:02:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:00,993 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-04-01 05:02:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:02:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-01 05:02:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:00,996 INFO L225 Difference]: With dead ends: 56 [2023-04-01 05:02:00,996 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 05:02:01,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:02:01,002 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:01,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 115 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 05:02:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 05:02:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2023-04-01 05:02:01,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2023-04-01 05:02:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:01,026 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2023-04-01 05:02:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:02:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2023-04-01 05:02:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 05:02:01,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:01,027 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:02:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:02:01,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:01,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1638390474, now seen corresponding path program 1 times [2023-04-01 05:02:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:01,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513638193] [2023-04-01 05:02:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 05:02:01,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513638193] [2023-04-01 05:02:01,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513638193] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:01,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:01,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:02:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545020018] [2023-04-01 05:02:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:01,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:02:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:02:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:02:01,129 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:02:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:01,235 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-04-01 05:02:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:02:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-04-01 05:02:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:01,239 INFO L225 Difference]: With dead ends: 60 [2023-04-01 05:02:01,239 INFO L226 Difference]: Without dead ends: 58 [2023-04-01 05:02:01,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:02:01,249 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:01,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 154 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-01 05:02:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-01 05:02:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2023-04-01 05:02:01,269 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2023-04-01 05:02:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:01,269 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2023-04-01 05:02:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:02:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2023-04-01 05:02:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 05:02:01,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:01,271 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:02:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:02:01,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:01,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2420119, now seen corresponding path program 1 times [2023-04-01 05:02:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:01,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524138846] [2023-04-01 05:02:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:02:01,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524138846] [2023-04-01 05:02:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524138846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:01,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:02:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458136386] [2023-04-01 05:02:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:02:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:02:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:02:01,367 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:02:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:01,448 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-04-01 05:02:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:02:01,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 05:02:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:01,451 INFO L225 Difference]: With dead ends: 65 [2023-04-01 05:02:01,451 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 05:02:01,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:02:01,452 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:01,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 05:02:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-04-01 05:02:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2023-04-01 05:02:01,470 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2023-04-01 05:02:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:01,470 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2023-04-01 05:02:01,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:02:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2023-04-01 05:02:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 05:02:01,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:01,472 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 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 05:02:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:02:01,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:01,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -365713863, now seen corresponding path program 1 times [2023-04-01 05:02:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:01,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105075221] [2023-04-01 05:02:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 05:02:01,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105075221] [2023-04-01 05:02:01,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105075221] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:01,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:01,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:02:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133294128] [2023-04-01 05:02:01,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:01,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:02:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:02:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:02:01,627 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:02:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:01,745 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2023-04-01 05:02:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:02:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-04-01 05:02:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:01,749 INFO L225 Difference]: With dead ends: 74 [2023-04-01 05:02:01,749 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 05:02:01,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:02:01,751 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:01,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 132 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 05:02:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-04-01 05:02:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-04-01 05:02:01,771 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2023-04-01 05:02:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:01,773 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-04-01 05:02:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:02:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-04-01 05:02:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 05:02:01,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:01,782 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 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 05:02:01,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:02:01,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:01,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 695118489, now seen corresponding path program 1 times [2023-04-01 05:02:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:01,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546363381] [2023-04-01 05:02:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 05:02:01,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546363381] [2023-04-01 05:02:01,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546363381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:01,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:01,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:02:01,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944728227] [2023-04-01 05:02:01,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:02:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:02:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:02:01,874 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 05:02:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:02,014 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2023-04-01 05:02:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:02:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2023-04-01 05:02:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:02,016 INFO L225 Difference]: With dead ends: 74 [2023-04-01 05:02:02,016 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 05:02:02,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:02:02,017 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:02,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 166 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 05:02:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-04-01 05:02:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 05:02:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2023-04-01 05:02:02,028 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2023-04-01 05:02:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:02,029 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2023-04-01 05:02:02,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 05:02:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2023-04-01 05:02:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 05:02:02,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:02:02,030 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:02:02,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 05:02:02,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:02:02,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:02:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1412319429, now seen corresponding path program 1 times [2023-04-01 05:02:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:02:02,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518032698] [2023-04-01 05:02:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:02:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:02:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:02:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-01 05:02:02,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:02:02,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518032698] [2023-04-01 05:02:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518032698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:02:02,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:02:02,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:02:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032099410] [2023-04-01 05:02:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:02:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:02:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:02:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:02:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:02:02,176 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-01 05:02:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:02:02,293 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2023-04-01 05:02:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:02:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2023-04-01 05:02:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:02:02,294 INFO L225 Difference]: With dead ends: 72 [2023-04-01 05:02:02,294 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 05:02:02,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:02:02,295 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:02:02,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 132 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:02:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 05:02:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 05:02:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 05:02:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 05:02:02,297 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2023-04-01 05:02:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:02:02,297 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 05:02:02,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-01 05:02:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 05:02:02,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 05:02:02,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 05:02:02,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 05:02:02,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 05:02:02,568 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2023-04-01 05:02:02,569 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 12) no Hoare annotation was computed. [2023-04-01 05:02:02,569 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 14 16) no Hoare annotation was computed. [2023-04-01 05:02:02,569 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2023-04-01 05:02:02,569 INFO L895 garLoopResultBuilder]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,569 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2023-04-01 05:02:02,569 INFO L899 garLoopResultBuilder]: For program point L60(line 60) no Hoare annotation was computed. [2023-04-01 05:02:02,569 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2023-04-01 05:02:02,570 INFO L895 garLoopResultBuilder]: At program point L56(lines 36 63) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,570 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,570 INFO L895 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,570 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,570 INFO L895 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0)) [2023-04-01 05:02:02,570 INFO L895 garLoopResultBuilder]: At program point L40-1(line 40) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0)) [2023-04-01 05:02:02,571 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 63) no Hoare annotation was computed. [2023-04-01 05:02:02,571 INFO L895 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,571 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2023-04-01 05:02:02,571 INFO L899 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2023-04-01 05:02:02,571 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0)) [2023-04-01 05:02:02,571 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0)) [2023-04-01 05:02:02,571 INFO L895 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0)) [2023-04-01 05:02:02,572 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,572 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,572 INFO L895 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,572 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2023-04-01 05:02:02,572 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~i~0 2) main_~len~0)) [2023-04-01 05:02:02,572 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 67) the Hoare annotation is: true [2023-04-01 05:02:02,572 INFO L899 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2023-04-01 05:02:02,573 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= 0 main_~i~0)) [2023-04-01 05:02:02,573 INFO L895 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,573 INFO L895 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (= main_~bufsize~0 (+ main_~limit~0 4)) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0)) [2023-04-01 05:02:02,573 INFO L899 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2023-04-01 05:02:02,573 INFO L899 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2023-04-01 05:02:02,573 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 05:02:02,573 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 05:02:02,573 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 05:02:02,573 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-01 05:02:02,573 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 05:02:02,574 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 05:02:02,574 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2023-04-01 05:02:02,574 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2023-04-01 05:02:02,574 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 22) the Hoare annotation is: true [2023-04-01 05:02:02,574 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-04-01 05:02:02,574 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-04-01 05:02:02,574 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-04-01 05:02:02,577 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:02:02,580 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 05:02:02,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 05:02:02 BoogieIcfgContainer [2023-04-01 05:02:02,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 05:02:02,596 INFO L158 Benchmark]: Toolchain (without parser) took 3338.31ms. Allocated memory was 196.1MB in the beginning and 235.9MB in the end (delta: 39.8MB). Free memory was 134.6MB in the beginning and 133.8MB in the end (delta: 782.6kB). Peak memory consumption was 41.1MB. Max. memory is 8.0GB. [2023-04-01 05:02:02,596 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 196.1MB. Free memory was 143.7MB in the beginning and 143.6MB in the end (delta: 84.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 05:02:02,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.31ms. Allocated memory is still 196.1MB. Free memory was 134.4MB in the beginning and 123.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 05:02:02,597 INFO L158 Benchmark]: Boogie Preprocessor took 29.45ms. Allocated memory is still 196.1MB. Free memory was 123.7MB in the beginning and 122.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 05:02:02,597 INFO L158 Benchmark]: RCFGBuilder took 427.31ms. Allocated memory was 196.1MB in the beginning and 235.9MB in the end (delta: 39.8MB). Free memory was 122.0MB in the beginning and 199.0MB in the end (delta: -77.0MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 05:02:02,598 INFO L158 Benchmark]: TraceAbstraction took 2692.38ms. Allocated memory is still 235.9MB. Free memory was 198.0MB in the beginning and 133.8MB in the end (delta: 64.2MB). Peak memory consumption was 64.2MB. Max. memory is 8.0GB. [2023-04-01 05:02:02,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 196.1MB. Free memory was 143.7MB in the beginning and 143.6MB in the end (delta: 84.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.31ms. Allocated memory is still 196.1MB. Free memory was 134.4MB in the beginning and 123.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.45ms. Allocated memory is still 196.1MB. Free memory was 123.7MB in the beginning and 122.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 427.31ms. Allocated memory was 196.1MB in the beginning and 235.9MB in the end (delta: 39.8MB). Free memory was 122.0MB in the beginning and 199.0MB in the end (delta: -77.0MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 2692.38ms. Allocated memory is still 235.9MB. Free memory was 198.0MB in the beginning and 133.8MB in the end (delta: 64.2MB). Peak memory consumption was 64.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 176 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108 mSDsluCounter, 1141 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 757 mSDsCounter, 108 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 701 IncrementalHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 108 mSolverCounterUnsat, 384 mSDtfsCounter, 701 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 368 HoareAnnotationTreeSize, 55 FomulaSimplifications, 542 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 152 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 532 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (bufsize == limit + 4 && 0 <= j) && 0 <= i - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((bufsize == limit + 4 && i + 1 <= len) && 0 <= j) && 5 + j <= bufsize) && 0 <= i - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: bufsize == limit + 4 && 0 <= i RESULT: Ultimate proved your program to be correct! [2023-04-01 05:02:02,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...