/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/rule60_list.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:24,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:24,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:24,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:52:24,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:52:24,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:52:24,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:52:24,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:52:24,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:52:24,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:52:24,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:52:24,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:52:24,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:52:24,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:52:24,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:52:24,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:52:24,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:52:24,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:52:24,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:52:24,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:52:24,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:52:24,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:52:24,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:52:24,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:52:24,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:52:24,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:52:24,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:52:24,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:52:24,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:52:24,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:52:24,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:52:24,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:52:24,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:52:24,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:52:24,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:52:24,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:52:24,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:24,445 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:24,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:24,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:24,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:24,448 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:24,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:24,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:24,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:24,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:24,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:24,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:24,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:24,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:24,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:24,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:24,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:24,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:24,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:24,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:24,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:24,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:24,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:24,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:24,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:24,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:24,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:24,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:24,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:24,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:24,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:24,929 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:24,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list.i [2020-12-22 03:52:25,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/706062bfb/fb75ab15f2d248efb4aaa5eddff1b106/FLAG69ba8ec5b [2020-12-22 03:52:25,841 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:25,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list.i [2020-12-22 03:52:25,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/706062bfb/fb75ab15f2d248efb4aaa5eddff1b106/FLAG69ba8ec5b [2020-12-22 03:52:26,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/706062bfb/fb75ab15f2d248efb4aaa5eddff1b106 [2020-12-22 03:52:26,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:26,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:26,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:26,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:26,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:26,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648e8610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26, skipping insertion in model container [2020-12-22 03:52:26,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:26,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:26,288 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list.i[291,304] [2020-12-22 03:52:26,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:26,527 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:26,544 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list.i[291,304] [2020-12-22 03:52:26,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:26,675 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:26,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26 WrapperNode [2020-12-22 03:52:26,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:26,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:26,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:26,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:26,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:26,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:26,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:26,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:26,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... [2020-12-22 03:52:26,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:26,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:26,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:26,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:26,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:26,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:26,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:26,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:52:26,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:26,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 03:52:26,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:26,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:26,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:27,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:27,469 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-22 03:52:27,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:27 BoogieIcfgContainer [2020-12-22 03:52:27,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:27,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:27,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:27,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:27,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:26" (1/3) ... [2020-12-22 03:52:27,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506f4334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:27, skipping insertion in model container [2020-12-22 03:52:27,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:26" (2/3) ... [2020-12-22 03:52:27,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506f4334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:27, skipping insertion in model container [2020-12-22 03:52:27,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:27" (3/3) ... [2020-12-22 03:52:27,480 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list.i [2020-12-22 03:52:27,487 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:27,492 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 03:52:27,512 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 03:52:27,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:27,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:27,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:27,541 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:27,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:27,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:27,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:27,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 03:52:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 03:52:27,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:27,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 03:52:27,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 28693860, now seen corresponding path program 1 times [2020-12-22 03:52:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:27,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114785269] [2020-12-22 03:52:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:27,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114785269] [2020-12-22 03:52:27,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:27,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 03:52:27,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076792996] [2020-12-22 03:52:27,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:27,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:27,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:27,918 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-12-22 03:52:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:27,979 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-22 03:52:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:27,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-22 03:52:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:27,991 INFO L225 Difference]: With dead ends: 36 [2020-12-22 03:52:27,991 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:52:27,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:52:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:52:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:52:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:52:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-12-22 03:52:28,029 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 5 [2020-12-22 03:52:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:28,029 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-12-22 03:52:28,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-12-22 03:52:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 03:52:28,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:28,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:28,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:28,031 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 118581514, now seen corresponding path program 1 times [2020-12-22 03:52:28,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:28,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689251360] [2020-12-22 03:52:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:28,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689251360] [2020-12-22 03:52:28,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:28,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 03:52:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872235731] [2020-12-22 03:52:28,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:52:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:52:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:28,285 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 7 states. [2020-12-22 03:52:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:28,419 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-12-22 03:52:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:52:28,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-12-22 03:52:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:28,421 INFO L225 Difference]: With dead ends: 14 [2020-12-22 03:52:28,421 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 03:52:28,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 03:52:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 03:52:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 03:52:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2020-12-22 03:52:28,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 8 [2020-12-22 03:52:28,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:28,426 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2020-12-22 03:52:28,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:52:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2020-12-22 03:52:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:52:28,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:28,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:28,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:28,428 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:28,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2097897967, now seen corresponding path program 1 times [2020-12-22 03:52:28,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:28,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607988960] [2020-12-22 03:52:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607988960] [2020-12-22 03:52:28,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:28,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 03:52:28,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162713583] [2020-12-22 03:52:28,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:52:28,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:28,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:52:28,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:28,671 INFO L87 Difference]: Start difference. First operand 12 states and 11 transitions. Second operand 7 states. [2020-12-22 03:52:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:28,806 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2020-12-22 03:52:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:52:28,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 03:52:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:28,807 INFO L225 Difference]: With dead ends: 12 [2020-12-22 03:52:28,807 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 03:52:28,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 03:52:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 03:52:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 03:52:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 03:52:28,810 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-12-22 03:52:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:28,811 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 03:52:28,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:52:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 03:52:28,811 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 03:52:28,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:52:28,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 03:52:28,837 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 03:52:28,838 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-12-22 03:52:28,838 INFO L189 CegarLoopUtils]: For program point L527(line 527) no Hoare annotation was computed. [2020-12-22 03:52:28,838 INFO L189 CegarLoopUtils]: For program point L523(line 523) no Hoare annotation was computed. [2020-12-22 03:52:28,838 INFO L189 CegarLoopUtils]: For program point L523-2(line 523) no Hoare annotation was computed. [2020-12-22 03:52:28,838 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 03:52:28,838 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 03:52:28,839 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 03:52:28,839 INFO L185 CegarLoopUtils]: At program point L540(lines 531 541) the Hoare annotation is: (and (= ULTIMATE.start_main_~dev~0.offset 0) (<= 0 |~#head~0.offset|) (<= |~#head~0.offset| 0)) [2020-12-22 03:52:28,839 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-12-22 03:52:28,839 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L534(lines 534 539) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L534-1(lines 534 539) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L526(lines 526 529) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L522(lines 522 525) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-12-22 03:52:28,840 INFO L189 CegarLoopUtils]: For program point L4(lines 1 541) no Hoare annotation was computed. [2020-12-22 03:52:28,841 INFO L189 CegarLoopUtils]: For program point L6-2(line 6) no Hoare annotation was computed. [2020-12-22 03:52:28,841 INFO L189 CegarLoopUtils]: For program point L4-1(lines 1 541) no Hoare annotation was computed. [2020-12-22 03:52:28,841 INFO L189 CegarLoopUtils]: For program point L4-2(lines 1 541) no Hoare annotation was computed. [2020-12-22 03:52:28,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:52:28 BoogieIcfgContainer [2020-12-22 03:52:28,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:52:28,860 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:52:28,860 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:52:28,860 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:52:28,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:27" (3/4) ... [2020-12-22 03:52:28,864 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 03:52:28,883 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-22 03:52:28,883 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-22 03:52:28,883 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 03:52:28,884 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 03:52:28,928 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/rule60_list.i-witness.graphml [2020-12-22 03:52:28,929 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:52:28,931 INFO L168 Benchmark]: Toolchain (without parser) took 2868.18 ms. Allocated memory is still 158.3 MB. Free memory was 132.8 MB in the beginning and 131.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:28,931 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:52:28,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 612.68 ms. Allocated memory is still 158.3 MB. Free memory was 132.5 MB in the beginning and 110.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:28,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.84 ms. Allocated memory is still 158.3 MB. Free memory was 110.6 MB in the beginning and 108.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:28,934 INFO L168 Benchmark]: Boogie Preprocessor took 80.96 ms. Allocated memory is still 158.3 MB. Free memory was 108.8 MB in the beginning and 141.0 MB in the end (delta: -32.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:28,934 INFO L168 Benchmark]: RCFGBuilder took 626.45 ms. Allocated memory is still 158.3 MB. Free memory was 141.0 MB in the beginning and 123.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:28,935 INFO L168 Benchmark]: TraceAbstraction took 1386.32 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 134.2 MB in the end (delta: -11.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:52:28,936 INFO L168 Benchmark]: Witness Printer took 69.05 ms. Allocated memory is still 158.3 MB. Free memory was 134.2 MB in the beginning and 131.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:28,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 612.68 ms. Allocated memory is still 158.3 MB. Free memory was 132.5 MB in the beginning and 110.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 83.84 ms. Allocated memory is still 158.3 MB. Free memory was 110.6 MB in the beginning and 108.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.96 ms. Allocated memory is still 158.3 MB. Free memory was 108.8 MB in the beginning and 141.0 MB in the end (delta: -32.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 626.45 ms. Allocated memory is still 158.3 MB. Free memory was 141.0 MB in the beginning and 123.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1386.32 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 134.2 MB in the end (delta: -11.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 69.05 ms. Allocated memory is still 158.3 MB. Free memory was 134.2 MB in the beginning and 131.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 6]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 6]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 531]: Loop Invariant Derived loop invariant: (dev == 0 && 0 <= head) && head <= 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 75 SDslu, 23 SDs, 0 SdLazy, 46 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 2 NumberOfFragments, 10 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1468 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...