/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:01:14,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:01:14,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:01:14,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:01:14,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:01:14,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:01:14,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:01:14,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:01:14,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:01:14,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:01:14,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:01:14,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:01:14,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:01:14,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:01:14,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:01:14,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:01:14,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:01:14,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:01:14,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:01:14,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:01:14,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:01:14,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:01:14,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:01:14,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:01:14,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:01:14,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:01:14,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:01:14,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:01:14,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:01:14,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:01:14,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:01:14,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:01:14,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:01:14,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:01:14,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:01:14,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:01:14,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:01:14,662 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:01:14,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:01:14,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:01:14,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:01:14,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:01:14,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:01:14,663 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:01:14,664 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:01:14,664 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:01:14,664 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:01:14,664 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:01:14,664 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:01:14,664 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:01:14,665 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:01:14,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:01:14,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:01:14,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:01:14,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:01:14,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:01:14,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:01:14,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:01:14,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:01:14,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:01:14,893 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:01:14,894 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:01:14,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i [2023-03-31 23:01:16,006 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:01:16,171 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:01:16,171 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/SpamAssassin-loop.i [2023-03-31 23:01:16,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b611774c/fd26c812fe2f43cd89e072f01b90795a/FLAG99d6b35f6 [2023-03-31 23:01:16,193 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b611774c/fd26c812fe2f43cd89e072f01b90795a [2023-03-31 23:01:16,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:01:16,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:01:16,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:01:16,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:01:16,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:01:16,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24026d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16, skipping insertion in model container [2023-03-31 23:01:16,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:01:16,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:01:16,372 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] [2023-03-31 23:01:16,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:01:16,388 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:01:16,395 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] [2023-03-31 23:01:16,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:01:16,407 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:01:16,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16 WrapperNode [2023-03-31 23:01:16,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:01:16,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:01:16,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:01:16,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:01:16,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,425 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:01:16,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:01:16,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:01:16,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:01:16,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (1/1) ... [2023-03-31 23:01:16,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:01:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:01:16,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:01:16,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:01:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:01:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:01:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:01:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:01:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:01:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:01:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:01:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:01:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:01:16,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:01:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:01:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:01:16,588 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:01:16,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:01:16,814 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:01:16,839 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:01:16,839 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:01:16,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:01:16 BoogieIcfgContainer [2023-03-31 23:01:16,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:01:16,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:01:16,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:01:16,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:01:16,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:01:16" (1/3) ... [2023-03-31 23:01:16,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf120df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:01:16, skipping insertion in model container [2023-03-31 23:01:16,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:01:16" (2/3) ... [2023-03-31 23:01:16,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf120df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:01:16, skipping insertion in model container [2023-03-31 23:01:16,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:01:16" (3/3) ... [2023-03-31 23:01:16,876 INFO L112 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2023-03-31 23:01:16,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:01:16,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:01:16,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:01:16,971 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;@3d3c8388, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:01:16,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:01:16,974 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) [2023-03-31 23:01:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 23:01:16,979 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:16,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:01:16,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:16,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash -380036565, now seen corresponding path program 1 times [2023-03-31 23:01:16,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:16,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202683070] [2023-03-31 23:01:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:16,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:01:17,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:17,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202683070] [2023-03-31 23:01:17,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202683070] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:17,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:17,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:01:17,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174624432] [2023-03-31 23:01:17,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:17,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:01:17,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:01:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:01:17,270 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) [2023-03-31 23:01:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:17,412 INFO L93 Difference]: Finished difference Result 85 states and 148 transitions. [2023-03-31 23:01:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:01:17,414 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 [2023-03-31 23:01:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:17,421 INFO L225 Difference]: With dead ends: 85 [2023-03-31 23:01:17,421 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 23:01:17,423 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 [2023-03-31 23:01:17,427 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 [2023-03-31 23:01:17,427 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] [2023-03-31 23:01:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 23:01:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-03-31 23:01:17,466 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) [2023-03-31 23:01:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2023-03-31 23:01:17,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2023-03-31 23:01:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:17,469 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2023-03-31 23:01:17,469 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) [2023-03-31 23:01:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2023-03-31 23:01:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 23:01:17,470 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:17,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:01:17,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:01:17,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:17,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash -358080598, now seen corresponding path program 1 times [2023-03-31 23:01:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:17,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091729174] [2023-03-31 23:01:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:01:17,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:17,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091729174] [2023-03-31 23:01:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091729174] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:17,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:17,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:01:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541901719] [2023-03-31 23:01:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:01:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:01:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:01:17,537 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) [2023-03-31 23:01:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:17,617 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-03-31 23:01:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:01:17,618 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 [2023-03-31 23:01:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:17,621 INFO L225 Difference]: With dead ends: 54 [2023-03-31 23:01:17,621 INFO L226 Difference]: Without dead ends: 52 [2023-03-31 23:01:17,622 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 [2023-03-31 23:01:17,622 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 [2023-03-31 23:01:17,623 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] [2023-03-31 23:01:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-03-31 23:01:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-03-31 23:01:17,630 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) [2023-03-31 23:01:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-03-31 23:01:17,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2023-03-31 23:01:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:17,631 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-03-31 23:01:17,632 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) [2023-03-31 23:01:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-03-31 23:01:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 23:01:17,632 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:17,632 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:01:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:01:17,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:17,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1006109912, now seen corresponding path program 1 times [2023-03-31 23:01:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729048440] [2023-03-31 23:01:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:01:17,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:17,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729048440] [2023-03-31 23:01:17,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729048440] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:17,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:17,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:01:17,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484569762] [2023-03-31 23:01:17,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:17,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:01:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:01:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:01:17,726 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) [2023-03-31 23:01:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:17,798 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-03-31 23:01:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:01:17,798 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 [2023-03-31 23:01:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:17,800 INFO L225 Difference]: With dead ends: 56 [2023-03-31 23:01:17,800 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 23:01:17,803 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 [2023-03-31 23:01:17,806 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:01:17,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 115 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:01:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 23:01:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 23:01:17,824 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) [2023-03-31 23:01:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2023-03-31 23:01:17,827 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2023-03-31 23:01:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:17,828 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2023-03-31 23:01:17,828 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) [2023-03-31 23:01:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2023-03-31 23:01:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 23:01:17,828 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:17,828 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:01:17,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:01:17,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:17,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1638390474, now seen corresponding path program 1 times [2023-03-31 23:01:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244273609] [2023-03-31 23:01:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:01:17,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244273609] [2023-03-31 23:01:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244273609] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:17,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:17,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:01:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899098020] [2023-03-31 23:01:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:17,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:01:17,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:01:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:01:17,892 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) [2023-03-31 23:01:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:17,991 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-03-31 23:01:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:01:17,991 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 [2023-03-31 23:01:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:17,994 INFO L225 Difference]: With dead ends: 60 [2023-03-31 23:01:17,994 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 23:01:17,994 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 [2023-03-31 23:01:18,001 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 [2023-03-31 23:01:18,003 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] [2023-03-31 23:01:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 23:01:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-03-31 23:01:18,014 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) [2023-03-31 23:01:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2023-03-31 23:01:18,014 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2023-03-31 23:01:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:18,015 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2023-03-31 23:01:18,015 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) [2023-03-31 23:01:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2023-03-31 23:01:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 23:01:18,015 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:18,016 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] [2023-03-31 23:01:18,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:01:18,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:18,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2420119, now seen corresponding path program 1 times [2023-03-31 23:01:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:18,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401752642] [2023-03-31 23:01:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:18,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:01:18,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:18,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401752642] [2023-03-31 23:01:18,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401752642] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:18,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:01:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886304966] [2023-03-31 23:01:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:01:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:01:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:01:18,089 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) [2023-03-31 23:01:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:18,139 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-03-31 23:01:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:01:18,139 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 [2023-03-31 23:01:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:18,140 INFO L225 Difference]: With dead ends: 65 [2023-03-31 23:01:18,140 INFO L226 Difference]: Without dead ends: 63 [2023-03-31 23:01:18,140 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 [2023-03-31 23:01:18,141 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, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:01:18,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:01:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-03-31 23:01:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-03-31 23:01:18,147 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) [2023-03-31 23:01:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2023-03-31 23:01:18,148 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2023-03-31 23:01:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:18,148 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2023-03-31 23:01:18,148 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) [2023-03-31 23:01:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2023-03-31 23:01:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 23:01:18,149 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:18,149 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] [2023-03-31 23:01:18,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:01:18,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:18,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:18,150 INFO L85 PathProgramCache]: Analyzing trace with hash -365713863, now seen corresponding path program 1 times [2023-03-31 23:01:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:18,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100263320] [2023-03-31 23:01:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 23:01:18,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:18,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100263320] [2023-03-31 23:01:18,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100263320] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:18,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:01:18,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243992697] [2023-03-31 23:01:18,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:18,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:01:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:01:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:01:18,210 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) [2023-03-31 23:01:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:18,281 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2023-03-31 23:01:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:01:18,281 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 [2023-03-31 23:01:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:18,282 INFO L225 Difference]: With dead ends: 74 [2023-03-31 23:01:18,282 INFO L226 Difference]: Without dead ends: 72 [2023-03-31 23:01:18,282 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 [2023-03-31 23:01:18,283 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-03-31 23:01:18,283 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] [2023-03-31 23:01:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-31 23:01:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-03-31 23:01:18,290 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) [2023-03-31 23:01:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-03-31 23:01:18,290 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2023-03-31 23:01:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:18,291 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-03-31 23:01:18,291 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) [2023-03-31 23:01:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-03-31 23:01:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 23:01:18,292 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:18,292 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] [2023-03-31 23:01:18,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 23:01:18,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:18,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 695118489, now seen corresponding path program 1 times [2023-03-31 23:01:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:18,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753238628] [2023-03-31 23:01:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 23:01:18,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753238628] [2023-03-31 23:01:18,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753238628] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:18,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:18,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:01:18,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613439131] [2023-03-31 23:01:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:01:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:01:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:01:18,387 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) [2023-03-31 23:01:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:18,480 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2023-03-31 23:01:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:01:18,480 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 [2023-03-31 23:01:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:18,481 INFO L225 Difference]: With dead ends: 74 [2023-03-31 23:01:18,481 INFO L226 Difference]: Without dead ends: 72 [2023-03-31 23:01:18,481 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 [2023-03-31 23:01:18,482 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 [2023-03-31 23:01:18,482 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] [2023-03-31 23:01:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-31 23:01:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-03-31 23:01:18,490 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) [2023-03-31 23:01:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2023-03-31 23:01:18,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2023-03-31 23:01:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:18,491 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2023-03-31 23:01:18,491 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) [2023-03-31 23:01:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2023-03-31 23:01:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 23:01:18,492 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:01:18,492 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] [2023-03-31 23:01:18,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 23:01:18,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:01:18,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:01:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1412319429, now seen corresponding path program 1 times [2023-03-31 23:01:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:01:18,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838578392] [2023-03-31 23:01:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:01:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:01:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:01:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 23:01:18,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:01:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838578392] [2023-03-31 23:01:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838578392] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:01:18,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:01:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:01:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34659256] [2023-03-31 23:01:18,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:01:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:01:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:01:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:01:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:01:18,582 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) [2023-03-31 23:01:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:01:18,683 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2023-03-31 23:01:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:01:18,683 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 [2023-03-31 23:01:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:01:18,684 INFO L225 Difference]: With dead ends: 72 [2023-03-31 23:01:18,684 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 23:01:18,684 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 [2023-03-31 23:01:18,685 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 [2023-03-31 23:01:18,685 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] [2023-03-31 23:01:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 23:01:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 23:01:18,686 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) [2023-03-31 23:01:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 23:01:18,686 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2023-03-31 23:01:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:01:18,686 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 23:01:18,686 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) [2023-03-31 23:01:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 23:01:18,686 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 23:01:18,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 23:01:18,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:01:18,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 23:01:18,891 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2023-03-31 23:01:18,892 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 12) no Hoare annotation was computed. [2023-03-31 23:01:18,892 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 14 16) no Hoare annotation was computed. [2023-03-31 23:01:18,892 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2023-03-31 23:01:18,892 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)) [2023-03-31 23:01:18,892 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2023-03-31 23:01:18,892 INFO L899 garLoopResultBuilder]: For program point L60(line 60) no Hoare annotation was computed. [2023-03-31 23:01:18,892 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2023-03-31 23:01:18,892 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)) [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,893 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 63) no Hoare annotation was computed. [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,893 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2023-03-31 23:01:18,893 INFO L899 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2023-03-31 23:01:18,893 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)) [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 67) the Hoare annotation is: true [2023-03-31 23:01:18,894 INFO L899 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,894 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)) [2023-03-31 23:01:18,895 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)) [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 22) the Hoare annotation is: true [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-03-31 23:01:18,895 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-03-31 23:01:18,896 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-03-31 23:01:18,898 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:01:18,899 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 23:01:18,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 11:01:18 BoogieIcfgContainer [2023-03-31 23:01:18,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 23:01:18,908 INFO L158 Benchmark]: Toolchain (without parser) took 2712.45ms. Allocated memory is still 366.0MB. Free memory was 318.7MB in the beginning and 142.6MB in the end (delta: 176.1MB). Peak memory consumption was 177.6MB. Max. memory is 8.0GB. [2023-03-31 23:01:18,909 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory is still 158.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 23:01:18,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.93ms. Allocated memory is still 366.0MB. Free memory was 318.7MB in the beginning and 308.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 23:01:18,909 INFO L158 Benchmark]: Boogie Preprocessor took 17.85ms. Allocated memory is still 366.0MB. Free memory was 308.1MB in the beginning and 306.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 23:01:18,909 INFO L158 Benchmark]: RCFGBuilder took 415.77ms. Allocated memory is still 366.0MB. Free memory was 306.1MB in the beginning and 292.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-03-31 23:01:18,909 INFO L158 Benchmark]: TraceAbstraction took 2064.15ms. Allocated memory is still 366.0MB. Free memory was 291.9MB in the beginning and 142.6MB in the end (delta: 149.3MB). Peak memory consumption was 150.3MB. Max. memory is 8.0GB. [2023-03-31 23:01:18,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory is still 158.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.93ms. Allocated memory is still 366.0MB. Free memory was 318.7MB in the beginning and 308.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.85ms. Allocated memory is still 366.0MB. Free memory was 308.1MB in the beginning and 306.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 415.77ms. Allocated memory is still 366.0MB. Free memory was 306.1MB in the beginning and 292.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 2064.15ms. Allocated memory is still 366.0MB. Free memory was 291.9MB in the beginning and 142.6MB in the end (delta: 149.3MB). Peak memory consumption was 150.3MB. 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: 1.9s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 176 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108 mSDsluCounter, 1141 SdHoareTripleChecker+Invalid, 0.4s 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, 0.6s 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! [2023-03-31 23:01:18,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...