/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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:21:07,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:21:07,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:21:07,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:21:07,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:21:07,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:21:07,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:21:07,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:21:07,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:07,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:07,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:07,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:21:07,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:21:07,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:21:07,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:21:07,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:21:07,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:21:07,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:21:07,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:21:07,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:21:07,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:21:07,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:21:07,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:21:07,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:21:07,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:21:07,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:21:07,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:21:07,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:21:07,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:07,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:07,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:07,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:07,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:07,736 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:07,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:07,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:07,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:07,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:07,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:07,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:07,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:07,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:07,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:07,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:07,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:07,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:07,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:07,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:07,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:07,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:07,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:07,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:07,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:07,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:07,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:08,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:08,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:08,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:08,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:08,203 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:08,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2020-12-22 04:21:08,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5c6069d/2bcc39309f3f47e6ac3d846e362aea43/FLAGe6cbca3e5 [2020-12-22 04:21:09,106 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:09,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2020-12-22 04:21:09,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5c6069d/2bcc39309f3f47e6ac3d846e362aea43/FLAGe6cbca3e5 [2020-12-22 04:21:09,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5c6069d/2bcc39309f3f47e6ac3d846e362aea43 [2020-12-22 04:21:09,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:09,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:09,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:09,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:09,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:09,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2463d358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09, skipping insertion in model container [2020-12-22 04:21:09,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:09,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:09,785 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/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2020-12-22 04:21:09,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:09,813 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:09,830 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/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2020-12-22 04:21:09,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:09,858 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:09,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09 WrapperNode [2020-12-22 04:21:09,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:09,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:09,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:09,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:09,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:09,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:09,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:09,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:09,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (1/1) ... [2020-12-22 04:21:09,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:09,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:09,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:09,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:09,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (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 04:21:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:10,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:10,362 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:10,362 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:21:10,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:10 BoogieIcfgContainer [2020-12-22 04:21:10,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:10,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:10,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:10,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:10,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:09" (1/3) ... [2020-12-22 04:21:10,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e74ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:10, skipping insertion in model container [2020-12-22 04:21:10,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:09" (2/3) ... [2020-12-22 04:21:10,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e74ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:10, skipping insertion in model container [2020-12-22 04:21:10,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:10" (3/3) ... [2020-12-22 04:21:10,378 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-12-22 04:21:10,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:10,393 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:10,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:10,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:10,513 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:10,513 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:10,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:10,514 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:10,514 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:10,514 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:10,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:21:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:10,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:10,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:10,543 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:21:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:10,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614438565] [2020-12-22 04:21:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:10,797 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 04:21:10,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614438565] [2020-12-22 04:21:10,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:10,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:21:10,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404392547] [2020-12-22 04:21:10,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:21:10,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:21:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:10,844 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-22 04:21:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:10,863 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-22 04:21:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:21:10,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:21:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:10,892 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:21:10,893 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:21:10,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:21:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:21:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:21:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-22 04:21:10,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-22 04:21:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:10,946 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-22 04:21:10,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:21:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-22 04:21:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:10,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:10,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:10,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:21:10,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2020-12-22 04:21:10,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:10,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225142102] [2020-12-22 04:21:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:11,175 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 04:21:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225142102] [2020-12-22 04:21:11,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:11,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:21:11,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110699677] [2020-12-22 04:21:11,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:21:11,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:21:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:21:11,181 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2020-12-22 04:21:11,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:11,248 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-22 04:21:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:11,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 04:21:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:11,250 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:21:11,251 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:21:11,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:21:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:21:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:21:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:21:11,257 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:21:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:11,257 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:21:11,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:21:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:21:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:21:11,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:11,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:11,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:21:11,259 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2020-12-22 04:21:11,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:11,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148344187] [2020-12-22 04:21:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148344187] [2020-12-22 04:21:11,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:11,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:21:11,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880988189] [2020-12-22 04:21:11,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:21:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:21:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:21:11,334 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-22 04:21:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:11,370 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-22 04:21:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:21:11,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 04:21:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:11,372 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:21:11,372 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:21:11,373 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 [2020-12-22 04:21:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:21:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:21:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:21:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-22 04:21:11,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-22 04:21:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:11,377 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-22 04:21:11,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:21:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-22 04:21:11,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:21:11,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:11,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:11,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:21:11,379 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash -275361512, now seen corresponding path program 1 times [2020-12-22 04:21:11,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:11,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775744826] [2020-12-22 04:21:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775744826] [2020-12-22 04:21:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341878247] [2020-12-22 04:21:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 04:21:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:11,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:21:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:12,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:12,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:12,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-22 04:21:12,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491868705] [2020-12-22 04:21:12,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:21:12,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:12,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:21:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:21:12,078 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 11 states. [2020-12-22 04:21:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:12,230 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-22 04:21:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:21:12,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-22 04:21:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:12,232 INFO L225 Difference]: With dead ends: 17 [2020-12-22 04:21:12,232 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:21:12,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:21:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:21:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:21:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:21:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-22 04:21:12,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-12-22 04:21:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:12,240 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-22 04:21:12,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:21:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-22 04:21:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:21:12,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:12,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:12,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:12,457 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1631725588, now seen corresponding path program 1 times [2020-12-22 04:21:12,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:12,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723484304] [2020-12-22 04:21:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723484304] [2020-12-22 04:21:12,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844712709] [2020-12-22 04:21:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 04:21:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:21:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:12,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:12,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:21:12,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407650093] [2020-12-22 04:21:12,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:21:12,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:21:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:12,597 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-12-22 04:21:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:12,628 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-22 04:21:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:12,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 04:21:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:12,630 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:21:12,630 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:21:12,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:21:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-22 04:21:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:21:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:21:12,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-12-22 04:21:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:12,647 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:21:12,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:21:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:21:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:21:12,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:12,649 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:12,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:12,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1688983890, now seen corresponding path program 2 times [2020-12-22 04:21:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603617748] [2020-12-22 04:21:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:13,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603617748] [2020-12-22 04:21:13,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677439789] [2020-12-22 04:21:13,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:13,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:13,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:13,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:21:13,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:13,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:13,303 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:21:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:13,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:13,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-22 04:21:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630791291] [2020-12-22 04:21:13,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:21:13,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:21:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:21:13,328 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2020-12-22 04:21:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:13,646 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 04:21:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:21:13,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 04:21:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:13,648 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:21:13,648 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:21:13,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:21:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:21:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:21:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:21:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 04:21:13,654 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-12-22 04:21:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:13,654 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 04:21:13,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:21:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 04:21:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:21:13,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:13,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:13,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:13,870 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:13,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1778778726, now seen corresponding path program 2 times [2020-12-22 04:21:13,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:13,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112220780] [2020-12-22 04:21:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112220780] [2020-12-22 04:21:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761769509] [2020-12-22 04:21:13,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:13,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:21:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:14,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:21:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812073331] [2020-12-22 04:21:14,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:21:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:21:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:21:14,041 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-12-22 04:21:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:14,073 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-22 04:21:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:21:14,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 04:21:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:14,074 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:21:14,075 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:21:14,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:21:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:21:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:21:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:21:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 04:21:14,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-12-22 04:21:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:14,080 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 04:21:14,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:21:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 04:21:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:21:14,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:14,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:14,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:14,296 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:14,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1928524372, now seen corresponding path program 3 times [2020-12-22 04:21:14,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:14,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114525697] [2020-12-22 04:21:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:21:14,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:21:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:21:14,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:21:14,365 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:21:14,365 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:21:14,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 04:21:14,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:21:14 BoogieIcfgContainer [2020-12-22 04:21:14,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:21:14,399 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:21:14,399 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:21:14,400 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:21:14,400 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:10" (3/4) ... [2020-12-22 04:21:14,404 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:21:14,487 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum01_bug02_sum01_bug02_base.case.i-witness.graphml [2020-12-22 04:21:14,488 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:21:14,490 INFO L168 Benchmark]: Toolchain (without parser) took 4996.59 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 126.7 MB in the beginning and 151.7 MB in the end (delta: -25.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:14,491 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:14,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.70 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:14,492 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.19 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:14,493 INFO L168 Benchmark]: Boogie Preprocessor took 27.58 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:14,493 INFO L168 Benchmark]: RCFGBuilder took 429.02 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 103.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:14,494 INFO L168 Benchmark]: TraceAbstraction took 4031.27 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 103.3 MB in the beginning and 153.8 MB in the end (delta: -50.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:14,495 INFO L168 Benchmark]: Witness Printer took 88.65 ms. Allocated memory is still 185.6 MB. Free memory was 153.8 MB in the beginning and 151.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:14,499 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 357.70 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.19 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.58 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.02 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 103.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4031.27 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 103.3 MB in the beginning and 153.8 MB in the end (delta: -50.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 88.65 ms. Allocated memory is still 185.6 MB. Free memory was 153.8 MB in the beginning and 151.7 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: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 23 SDslu, 85 SDs, 0 SdLazy, 225 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=6, 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, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 5073 SizeOfPredicates, 9 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 17/47 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 incorrect! Received shutdown request...