/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:32,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:32,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:32,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:32,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:32,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:32,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:32,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:16:32,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:32,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:32,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:32,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:32,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:32,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:32,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:32,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:32,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:32,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:32,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:32,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:32,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:32,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:32,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:32,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:32,599 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:32,599 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:32,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:32,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:32,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:32,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:32,873 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:32,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2021-05-02 23:16:32,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be92e9809/406f2b5ac5bb42f4835f07329b1730a8/FLAGefca3a884 [2021-05-02 23:16:33,268 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:33,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2021-05-02 23:16:33,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be92e9809/406f2b5ac5bb42f4835f07329b1730a8/FLAGefca3a884 [2021-05-02 23:16:33,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be92e9809/406f2b5ac5bb42f4835f07329b1730a8 [2021-05-02 23:16:33,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:33,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:33,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:33,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:33,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:33,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e482861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33, skipping insertion in model container [2021-05-02 23:16:33,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:33,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:33,428 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c[321,334] [2021-05-02 23:16:33,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:33,442 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:33,462 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c[321,334] [2021-05-02 23:16:33,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:33,481 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:33,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33 WrapperNode [2021-05-02 23:16:33,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:33,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:33,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:33,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:33,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (1/1) ... [2021-05-02 23:16:33,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:33,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:33,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:33,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:33,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (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 [2021-05-02 23:16:33,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:33,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:33,567 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:33,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:33,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:33,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:33,711 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:16:33,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:33 BoogieIcfgContainer [2021-05-02 23:16:33,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:33,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:33,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:33,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:33,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:33" (1/3) ... [2021-05-02 23:16:33,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189a39c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:33, skipping insertion in model container [2021-05-02 23:16:33,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:33" (2/3) ... [2021-05-02 23:16:33,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189a39c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:33, skipping insertion in model container [2021-05-02 23:16:33,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:33" (3/3) ... [2021-05-02 23:16:33,717 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2021-05-02 23:16:33,720 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:33,722 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:33,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:33,744 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:33,744 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:33,744 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:33,744 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:33,744 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:33,744 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:33,744 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:33,745 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:16:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:16:33,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,768 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,768 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-02 23:16:33,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60384069] [2021-05-02 23:16:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,873 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,034 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60384069] [2021-05-02 23:16:34,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [60384069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700653476] [2021-05-02 23:16:34,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:34,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:34,050 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,108 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 23:16:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:16:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,114 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:16:34,114 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 23:16:34,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 23:16:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 23:16:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 23:16:34,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 23:16:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,142 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 23:16:34,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 23:16:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:16:34,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,143 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:34,144 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-02 23:16:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282539236] [2021-05-02 23:16:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,153 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,262 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282539236] [2021-05-02 23:16:34,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [282539236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:34,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376945967] [2021-05-02 23:16:34,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:34,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:34,268 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,347 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 23:16:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:16:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,348 INFO L225 Difference]: With dead ends: 18 [2021-05-02 23:16:34,348 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:16:34,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:16:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:16:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 23:16:34,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 23:16:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,353 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 23:16:34,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 23:16:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:34,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,353 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:34,354 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-02 23:16:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158855292] [2021-05-02 23:16:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,397 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~y~0_6 4294967296) 1024) InVars {main_~y~0=v_main_~y~0_6} OutVars{main_~y~0=v_main_~y~0_6} AuxVars[] AssignedVars[] [2021-05-02 23:16:34,415 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:16:34,422 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:16:34,470 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:16:34,503 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:16:34,528 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:16:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,690 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158855292] [2021-05-02 23:16:34,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158855292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:34,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012828732] [2021-05-02 23:16:34,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:34,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:34,691 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,823 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-05-02 23:16:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:34,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 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 12 [2021-05-02 23:16:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,824 INFO L225 Difference]: With dead ends: 17 [2021-05-02 23:16:34,824 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 23:16:34,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 23:16:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 23:16:34,825 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) [2021-05-02 23:16:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 23:16:34,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-02 23:16:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,825 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 23:16:34,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 23:16:34,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 23:16:34,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:34,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 23:16:34,980 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 23:16:34,980 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 23:16:34,981 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 12 22) the Hoare annotation is: true [2021-05-02 23:16:34,981 INFO L194 CegarLoopUtils]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (= main_~y~0 0) (= main_~x~0 0)) [2021-05-02 23:16:34,982 INFO L194 CegarLoopUtils]: At program point L16-3(lines 16 19) the Hoare annotation is: (= main_~x~0 0) [2021-05-02 23:16:34,982 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 12 22) the Hoare annotation is: true [2021-05-02 23:16:34,982 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-02 23:16:34,982 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-05-02 23:16:34,982 INFO L194 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:16:34,982 INFO L194 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:16:34,982 INFO L201 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-05-02 23:16:34,982 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:16:34,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:16:34 BoogieIcfgContainer [2021-05-02 23:16:34,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:16:34,991 INFO L168 Benchmark]: Toolchain (without parser) took 1701.88 ms. Allocated memory was 194.0 MB in the beginning and 285.2 MB in the end (delta: 91.2 MB). Free memory was 160.1 MB in the beginning and 238.7 MB in the end (delta: -78.5 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:34,992 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory was 176.4 MB in the beginning and 176.3 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:16:34,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.01 ms. Allocated memory is still 194.0 MB. Free memory was 160.0 MB in the beginning and 177.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:34,992 INFO L168 Benchmark]: Boogie Preprocessor took 30.23 ms. Allocated memory is still 194.0 MB. Free memory was 177.7 MB in the beginning and 176.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:16:34,993 INFO L168 Benchmark]: RCFGBuilder took 198.38 ms. Allocated memory is still 194.0 MB. Free memory was 176.2 MB in the beginning and 163.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:34,993 INFO L168 Benchmark]: TraceAbstraction took 1277.30 ms. Allocated memory was 194.0 MB in the beginning and 285.2 MB in the end (delta: 91.2 MB). Free memory was 163.1 MB in the beginning and 238.7 MB in the end (delta: -75.6 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:34,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory was 176.4 MB in the beginning and 176.3 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 191.01 ms. Allocated memory is still 194.0 MB. Free memory was 160.0 MB in the beginning and 177.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.23 ms. Allocated memory is still 194.0 MB. Free memory was 177.7 MB in the beginning and 176.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 198.38 ms. Allocated memory is still 194.0 MB. Free memory was 176.2 MB in the beginning and 163.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1277.30 ms. Allocated memory was 194.0 MB in the beginning and 285.2 MB in the end (delta: 91.2 MB). Free memory was 163.1 MB in the beginning and 238.7 MB in the end (delta: -75.6 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1083.1ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 18.9ms, AutomataDifference: 295.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 154.1ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 33 SDtfs, 21 SDslu, 36 SDs, 0 SdLazy, 41 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 267.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 36 PreInvPairs, 49 NumberOfFragments, 67 HoareAnnotationTreeSize, 36 FomulaSimplifications, 62 FormulaSimplificationTreeSizeReduction, 64.7ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 324 FormulaSimplificationTreeSizeReductionInter, 81.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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: 16]: Loop Invariant Derived loop invariant: y == 0 || x == 0 - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...