/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/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:52:07,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:52:07,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:52:07,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:52:07,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:52:07,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:52:07,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:52:07,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:52:07,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:52:07,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:52:07,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:52:07,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:52:07,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:52:07,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:52:07,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:52:07,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:52:07,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:52:07,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:52:07,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:52:07,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:52:07,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:52:07,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:52:07,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:52:07,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:52:07,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:52:07,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:52:07,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:52:07,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:52:07,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:52:07,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:52:07,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:52:07,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:52:07,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:52:07,806 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:52:07,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:52:07,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:52:07,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:52:07,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:52:07,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:52:07,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:52:07,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:52:07,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:52:07,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:52:07,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:52:07,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:52:07,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:52:07,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:07,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:52:07,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:52:07,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:52:07,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:52:07,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:52:07,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:52:07,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:52:07,813 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:52:08,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:52:08,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:52:08,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:52:08,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:52:08,255 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:52:08,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-2.c [2020-12-23 06:52:08,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f3212f189/88afe4373e234556844da15a242e10d4/FLAGf1bd0be4c [2020-12-23 06:52:08,998 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:52:08,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-2.c [2020-12-23 06:52:09,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f3212f189/88afe4373e234556844da15a242e10d4/FLAGf1bd0be4c [2020-12-23 06:52:09,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f3212f189/88afe4373e234556844da15a242e10d4 [2020-12-23 06:52:09,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:52:09,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:52:09,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:09,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:52:09,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:52:09,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1d145a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09, skipping insertion in model container [2020-12-23 06:52:09,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:52:09,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:52:09,541 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-2.c[322,335] [2020-12-23 06:52:09,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:09,564 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:52:09,577 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-2.c[322,335] [2020-12-23 06:52:09,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:09,596 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:52:09,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09 WrapperNode [2020-12-23 06:52:09,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:09,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:09,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:52:09,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:52:09,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:09,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:52:09,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:52:09,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:52:09,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... [2020-12-23 06:52:09,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:52:09,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:52:09,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:52:09,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:52:09,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:09,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:52:09,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:52:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:52:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:52:09,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:52:09,971 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:52:09,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:09 BoogieIcfgContainer [2020-12-23 06:52:09,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:52:09,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:52:09,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:52:09,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:52:09,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:52:09" (1/3) ... [2020-12-23 06:52:09,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aea2f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:09, skipping insertion in model container [2020-12-23 06:52:09,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:09" (2/3) ... [2020-12-23 06:52:09,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aea2f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:09, skipping insertion in model container [2020-12-23 06:52:09,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:09" (3/3) ... [2020-12-23 06:52:09,985 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-12-23 06:52:10,002 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:52:10,013 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:52:10,065 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:52:10,129 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:52:10,129 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:52:10,129 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:52:10,129 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:52:10,129 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:52:10,129 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:52:10,130 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:52:10,130 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:52:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 06:52:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:52:10,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:10,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:52:10,155 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 06:52:10,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:10,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858444743] [2020-12-23 06:52:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858444743] [2020-12-23 06:52:10,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:52:10,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:52:10,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25821756] [2020-12-23 06:52:10,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:52:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:52:10,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:10,613 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-23 06:52:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:10,643 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 06:52:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:52:10,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:52:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:10,654 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:52:10,655 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:52:10,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:52:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:52:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:52:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:52:10,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:52:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:10,691 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:52:10,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:52:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:52:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:52:10,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:10,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:10,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:52:10,693 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 06:52:10,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:10,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345437278] [2020-12-23 06:52:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345437278] [2020-12-23 06:52:10,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900876033] [2020-12-23 06:52:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:52:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:10,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:10,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:52:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896456393] [2020-12-23 06:52:10,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:52:10,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:52:10,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:10,944 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 06:52:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:10,969 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 06:52:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:52:10,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:52:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:10,970 INFO L225 Difference]: With dead ends: 13 [2020-12-23 06:52:10,970 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:52:10,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:52:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:52:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:52:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:52:10,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 06:52:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:10,975 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:52:10,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:52:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:52:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:52:10,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:10,976 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:11,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:52:11,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:11,192 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-23 06:52:11,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:11,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891772389] [2020-12-23 06:52:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891772389] [2020-12-23 06:52:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463644780] [2020-12-23 06:52:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 06:52:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:52:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:11,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 06:52:11,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:52:11,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-23 06:52:11,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722549656] [2020-12-23 06:52:11,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:52:11,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:11,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:52:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:11,369 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2020-12-23 06:52:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:11,386 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-23 06:52:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:52:11,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 06:52:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:11,387 INFO L225 Difference]: With dead ends: 9 [2020-12-23 06:52:11,387 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:52:11,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:52:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:52:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:52:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:52:11,389 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-12-23 06:52:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:11,389 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:52:11,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:52:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:52:11,390 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:52:11,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:11,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:52:11,617 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:52:11,617 INFO L192 CegarLoopUtils]: At program point L15-2(lines 15 17) the Hoare annotation is: true [2020-12-23 06:52:11,617 INFO L189 CegarLoopUtils]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2020-12-23 06:52:11,618 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-23 06:52:11,618 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:52:11,618 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:52:11,618 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:52:11,618 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-23 06:52:11,619 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-23 06:52:11,619 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 20) the Hoare annotation is: true [2020-12-23 06:52:11,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:52:11 BoogieIcfgContainer [2020-12-23 06:52:11,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:52:11,629 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:52:11,629 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:52:11,629 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:52:11,630 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:09" (3/4) ... [2020-12-23 06:52:11,633 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:52:11,642 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:52:11,642 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:52:11,643 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:52:11,643 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:52:11,675 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/simple_4-2.c-witness.graphml [2020-12-23 06:52:11,675 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:52:11,677 INFO L168 Benchmark]: Toolchain (without parser) took 2319.90 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 77.9 MB in the end (delta: 48.9 MB). Peak memory consumption was 49.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,678 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:52:11,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,680 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.59 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,681 INFO L168 Benchmark]: Boogie Preprocessor took 33.59 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 115.1 MB in the end (delta: 845.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,681 INFO L168 Benchmark]: RCFGBuilder took 298.52 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 104.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,682 INFO L168 Benchmark]: TraceAbstraction took 1653.66 ms. Allocated memory is still 151.0 MB. Free memory was 104.1 MB in the beginning and 80.0 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,683 INFO L168 Benchmark]: Witness Printer took 46.42 ms. Allocated memory is still 151.0 MB. Free memory was 80.0 MB in the beginning and 77.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:11,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 238.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.59 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.59 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 115.1 MB in the end (delta: 845.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.52 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 104.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1653.66 ms. Allocated memory is still 151.0 MB. Free memory was 104.1 MB in the beginning and 80.0 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. * Witness Printer took 46.42 ms. Allocated memory is still 151.0 MB. Free memory was 80.0 MB in the beginning and 77.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 1 SDslu, 17 SDs, 0 SdLazy, 17 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 2 LocationsWithAnnotation, 2 PreInvPairs, 5 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 36 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 573 SizeOfPredicates, 3 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 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...