/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 21:59:11,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:59:11,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:59:11,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:59:11,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:59:11,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:59:11,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:59:11,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:59:11,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:59:11,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:59:11,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:59:11,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 21:59:11,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 21:59:11,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 21:59:11,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 21:59:11,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 21:59:11,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 21:59:11,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 21:59:11,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 21:59:11,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 21:59:11,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 21:59:11,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 21:59:11,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 21:59:11,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 21:59:11,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 21:59:11,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:59:11,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:59:11,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:59:11,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 21:59:11,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:59:11,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:59:11,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:59:11,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:59:11,841 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:59:11,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:59:11,842 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:59:11,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:59:11,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:59:11,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:59:11,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:59:11,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:59:11,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:59:11,844 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:59:11,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:59:11,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:59:11,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:59:11,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:59:11,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:59:11,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:59:11,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:59:11,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:59:11,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:59:11,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:59:11,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:59:11,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:59:11,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:59:11,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:59:11,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:59:11,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:59:12,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:59:12,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:59:12,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:59:12,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:59:12,315 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:59:12,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-11-06 21:59:12,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761bccfdd/72ed5af15042411aa8676ea1227fe273/FLAGb1f7d0061 [2020-11-06 21:59:12,985 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:59:12,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-11-06 21:59:12,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761bccfdd/72ed5af15042411aa8676ea1227fe273/FLAGb1f7d0061 [2020-11-06 21:59:13,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761bccfdd/72ed5af15042411aa8676ea1227fe273 [2020-11-06 21:59:13,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:59:13,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:59:13,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:59:13,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:59:13,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:59:13,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ad50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13, skipping insertion in model container [2020-11-06 21:59:13,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:59:13,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:59:13,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:59:13,634 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:59:13,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:59:13,669 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:59:13,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13 WrapperNode [2020-11-06 21:59:13,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:59:13,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:59:13,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:59:13,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:59:13,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (1/1) ... [2020-11-06 21:59:13,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:59:13,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:59:13,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:59:13,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:59:13,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (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 [2020-11-06 21:59:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:59:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:59:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:59:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-11-06 21:59:13,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:59:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:59:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:59:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:59:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:59:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 21:59:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-11-06 21:59:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:59:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:59:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:59:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:59:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:59:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:59:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:59:14,169 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:59:14,169 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 21:59:14,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:14 BoogieIcfgContainer [2020-11-06 21:59:14,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:59:14,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:59:14,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:59:14,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:59:14,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:59:13" (1/3) ... [2020-11-06 21:59:14,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cc044b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:14, skipping insertion in model container [2020-11-06 21:59:14,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:13" (2/3) ... [2020-11-06 21:59:14,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cc044b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:14, skipping insertion in model container [2020-11-06 21:59:14,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:14" (3/3) ... [2020-11-06 21:59:14,183 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-11-06 21:59:14,213 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:59:14,217 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:59:14,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:59:14,258 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:59:14,259 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:59:14,259 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:59:14,259 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:59:14,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:59:14,259 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:59:14,259 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:59:14,260 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:59:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-06 21:59:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 21:59:14,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:14,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:14,288 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash 192942640, now seen corresponding path program 1 times [2020-11-06 21:59:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:14,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081587448] [2020-11-06 21:59:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:14,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:14,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 21:59:14,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081587448] [2020-11-06 21:59:14,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:59:14,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 21:59:14,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380257081] [2020-11-06 21:59:14,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 21:59:14,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 21:59:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 21:59:14,758 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 8 states. [2020-11-06 21:59:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:15,486 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-11-06 21:59:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 21:59:15,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-06 21:59:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:15,514 INFO L225 Difference]: With dead ends: 47 [2020-11-06 21:59:15,515 INFO L226 Difference]: Without dead ends: 27 [2020-11-06 21:59:15,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-06 21:59:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-06 21:59:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-06 21:59:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-06 21:59:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-11-06 21:59:15,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2020-11-06 21:59:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:15,592 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-11-06 21:59:15,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 21:59:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-11-06 21:59:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 21:59:15,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:15,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:15,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 21:59:15,597 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1691639833, now seen corresponding path program 1 times [2020-11-06 21:59:15,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:15,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862806677] [2020-11-06 21:59:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 21:59:15,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862806677] [2020-11-06 21:59:15,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:59:15,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 21:59:15,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958472498] [2020-11-06 21:59:15,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:59:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:59:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:15,860 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 9 states. [2020-11-06 21:59:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:16,293 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-11-06 21:59:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 21:59:16,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-06 21:59:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:16,296 INFO L225 Difference]: With dead ends: 35 [2020-11-06 21:59:16,296 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 21:59:16,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:59:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 21:59:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-11-06 21:59:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 21:59:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-06 21:59:16,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2020-11-06 21:59:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:16,309 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-06 21:59:16,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:59:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-06 21:59:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 21:59:16,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:16,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:16,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 21:59:16,311 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:16,312 INFO L82 PathProgramCache]: Analyzing trace with hash -118590102, now seen corresponding path program 1 times [2020-11-06 21:59:16,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:16,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326262392] [2020-11-06 21:59:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:16,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:16,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:16,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 21:59:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 21:59:16,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326262392] [2020-11-06 21:59:16,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274215334] [2020-11-06 21:59:16,464 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 [2020-11-06 21:59:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 21:59:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-06 21:59:16,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:16,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-11-06 21:59:16,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248411635] [2020-11-06 21:59:16,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 21:59:16,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 21:59:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-06 21:59:16,687 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 11 states. [2020-11-06 21:59:16,985 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-11-06 21:59:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:17,365 INFO L93 Difference]: Finished difference Result 54 states and 81 transitions. [2020-11-06 21:59:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 21:59:17,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-11-06 21:59:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:17,369 INFO L225 Difference]: With dead ends: 54 [2020-11-06 21:59:17,369 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 21:59:17,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-06 21:59:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 21:59:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-11-06 21:59:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 21:59:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-11-06 21:59:17,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 30 [2020-11-06 21:59:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:17,382 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-11-06 21:59:17,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 21:59:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-11-06 21:59:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 21:59:17,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:17,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:17,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 21:59:17,598 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash 936683835, now seen corresponding path program 1 times [2020-11-06 21:59:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:17,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567663818] [2020-11-06 21:59:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:17,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:17,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:17,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:17,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-06 21:59:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567663818] [2020-11-06 21:59:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951191623] [2020-11-06 21:59:17,939 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 [2020-11-06 21:59:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 21:59:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 21:59:18,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:18,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 15 [2020-11-06 21:59:18,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584122368] [2020-11-06 21:59:18,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 21:59:18,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:18,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 21:59:18,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:59:18,111 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 15 states. [2020-11-06 21:59:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:19,642 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-11-06 21:59:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 21:59:19,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-11-06 21:59:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:19,648 INFO L225 Difference]: With dead ends: 57 [2020-11-06 21:59:19,648 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 21:59:19,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-11-06 21:59:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 21:59:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-11-06 21:59:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 21:59:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2020-11-06 21:59:19,671 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 37 [2020-11-06 21:59:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:19,672 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2020-11-06 21:59:19,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 21:59:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2020-11-06 21:59:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:59:19,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:19,679 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:19,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:19,893 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:19,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:19,894 INFO L82 PathProgramCache]: Analyzing trace with hash -561126020, now seen corresponding path program 2 times [2020-11-06 21:59:19,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:19,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711100717] [2020-11-06 21:59:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:19,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:20,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:20,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-06 21:59:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711100717] [2020-11-06 21:59:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386630142] [2020-11-06 21:59:20,198 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 [2020-11-06 21:59:20,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:59:20,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:20,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 21:59:20,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-06 21:59:20,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:20,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2020-11-06 21:59:20,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079980621] [2020-11-06 21:59:20,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 21:59:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 21:59:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-11-06 21:59:20,377 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 16 states. [2020-11-06 21:59:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:21,840 INFO L93 Difference]: Finished difference Result 68 states and 119 transitions. [2020-11-06 21:59:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 21:59:21,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-11-06 21:59:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:21,843 INFO L225 Difference]: With dead ends: 68 [2020-11-06 21:59:21,844 INFO L226 Difference]: Without dead ends: 63 [2020-11-06 21:59:21,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-11-06 21:59:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-06 21:59:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2020-11-06 21:59:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 21:59:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 49 transitions. [2020-11-06 21:59:21,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 49 transitions. Word has length 44 [2020-11-06 21:59:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:21,863 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 49 transitions. [2020-11-06 21:59:21,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 21:59:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 49 transitions. [2020-11-06 21:59:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-06 21:59:21,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:21,865 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:22,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:22,081 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash 605433576, now seen corresponding path program 3 times [2020-11-06 21:59:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:22,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574704272] [2020-11-06 21:59:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-06 21:59:22,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574704272] [2020-11-06 21:59:22,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364780349] [2020-11-06 21:59:22,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-11-06 21:59:22,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 21:59:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 21:59:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 21:59:22,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:22,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-11-06 21:59:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984211413] [2020-11-06 21:59:22,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 21:59:22,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 21:59:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:59:22,523 INFO L87 Difference]: Start difference. First operand 36 states and 49 transitions. Second operand 15 states. [2020-11-06 21:59:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:23,626 INFO L93 Difference]: Finished difference Result 84 states and 141 transitions. [2020-11-06 21:59:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 21:59:23,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-11-06 21:59:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:23,629 INFO L225 Difference]: With dead ends: 84 [2020-11-06 21:59:23,629 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 21:59:23,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-11-06 21:59:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 21:59:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-06 21:59:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-06 21:59:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2020-11-06 21:59:23,648 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 83 transitions. Word has length 44 [2020-11-06 21:59:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:23,649 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 83 transitions. [2020-11-06 21:59:23,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 21:59:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 83 transitions. [2020-11-06 21:59:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-06 21:59:23,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:23,652 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:23,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:23,867 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash 928202551, now seen corresponding path program 4 times [2020-11-06 21:59:23,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:23,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251140275] [2020-11-06 21:59:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 21:59:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 21:59:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-11-06 21:59:23,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251140275] [2020-11-06 21:59:23,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492464845] [2020-11-06 21:59:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:24,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 21:59:24,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 21:59:24,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 21:59:24,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:24,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-06 21:59:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103650150] [2020-11-06 21:59:24,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 21:59:24,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:24,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 21:59:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 21:59:24,092 INFO L87 Difference]: Start difference. First operand 55 states and 83 transitions. Second operand 7 states. [2020-11-06 21:59:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:24,266 INFO L93 Difference]: Finished difference Result 104 states and 191 transitions. [2020-11-06 21:59:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 21:59:24,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-11-06 21:59:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:24,268 INFO L225 Difference]: With dead ends: 104 [2020-11-06 21:59:24,268 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 21:59:24,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 21:59:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-06 21:59:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-06 21:59:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 89 transitions. [2020-11-06 21:59:24,286 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 89 transitions. Word has length 64 [2020-11-06 21:59:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:24,287 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 89 transitions. [2020-11-06 21:59:24,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 21:59:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 89 transitions. [2020-11-06 21:59:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-06 21:59:24,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:24,289 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:24,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 21:59:24,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:24,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1988505957, now seen corresponding path program 5 times [2020-11-06 21:59:24,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:24,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545884045] [2020-11-06 21:59:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:59:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-06 21:59:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 63 proven. 63 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-06 21:59:24,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545884045] [2020-11-06 21:59:24,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192727322] [2020-11-06 21:59:24,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:24,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-06 21:59:24,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-06 21:59:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-11-06 21:59:25,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:25,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2020-11-06 21:59:25,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345248523] [2020-11-06 21:59:25,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 21:59:25,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 21:59:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-11-06 21:59:25,114 INFO L87 Difference]: Start difference. First operand 58 states and 89 transitions. Second operand 18 states. [2020-11-06 21:59:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:26,764 INFO L93 Difference]: Finished difference Result 91 states and 176 transitions. [2020-11-06 21:59:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 21:59:26,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-11-06 21:59:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:26,766 INFO L225 Difference]: With dead ends: 91 [2020-11-06 21:59:26,766 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 21:59:26,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2020-11-06 21:59:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 21:59:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 21:59:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 21:59:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 21:59:26,770 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2020-11-06 21:59:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:26,770 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 21:59:26,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 21:59:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 21:59:26,771 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 21:59:26,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:26,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 21:59:27,124 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-11-06 21:59:27,847 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 17 [2020-11-06 21:59:27,973 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 12 [2020-11-06 21:59:28,100 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 21:59:28,101 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 21:59:28,101 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 21:59:28,101 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 21:59:28,101 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 21:59:28,102 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 21:59:28,102 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 21:59:28,102 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 21:59:28,102 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 21:59:28,102 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 21:59:28,102 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 21:59:28,102 INFO L266 CegarLoopResult]: For program point L30(lines 30 34) no Hoare annotation was computed. [2020-11-06 21:59:28,102 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 28 48) the Hoare annotation is: true [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 28 48) no Hoare annotation was computed. [2020-11-06 21:59:28,103 INFO L262 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 28 48) no Hoare annotation was computed. [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point L43(lines 43 47) no Hoare annotation was computed. [2020-11-06 21:59:28,103 INFO L262 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (<= 0 main_~n~0) [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point L36(lines 36 41) no Hoare annotation was computed. [2020-11-06 21:59:28,103 INFO L266 CegarLoopResult]: For program point ackermannEXIT(lines 17 25) no Hoare annotation was computed. [2020-11-06 21:59:28,104 INFO L262 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0))) [2020-11-06 21:59:28,104 INFO L266 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-11-06 21:59:28,104 INFO L262 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0))) [2020-11-06 21:59:28,104 INFO L262 CegarLoopResult]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (<= 1 |ackermann_#in~m|)) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 3 |ackermann_#t~ret8|) .cse0 .cse1 .cse2) (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse0 .cse1 .cse2))) [2020-11-06 21:59:28,105 INFO L269 CegarLoopResult]: At program point ackermannENTRY(lines 17 25) the Hoare annotation is: true [2020-11-06 21:59:28,105 INFO L266 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-11-06 21:59:28,105 INFO L266 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-06 21:59:28,105 INFO L266 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-11-06 21:59:28,105 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 21:59:28,105 INFO L266 CegarLoopResult]: For program point ackermannFINAL(lines 17 25) no Hoare annotation was computed. [2020-11-06 21:59:28,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:59:28 BoogieIcfgContainer [2020-11-06 21:59:28,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 21:59:28,115 INFO L168 Benchmark]: Toolchain (without parser) took 14706.49 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 126.0 MB in the beginning and 214.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 146.3 MB. Max. memory is 8.0 GB. [2020-11-06 21:59:28,116 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:59:28,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.68 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 21:59:28,119 INFO L168 Benchmark]: Boogie Preprocessor took 34.98 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 21:59:28,120 INFO L168 Benchmark]: RCFGBuilder took 464.71 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 21:59:28,121 INFO L168 Benchmark]: TraceAbstraction took 13937.90 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 100.4 MB in the beginning and 214.5 MB in the end (delta: -114.1 MB). Peak memory consumption was 120.1 MB. Max. memory is 8.0 GB. [2020-11-06 21:59:28,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.68 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.98 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.71 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13937.90 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 100.4 MB in the beginning and 214.5 MB in the end (delta: -114.1 MB). Peak memory consumption was 120.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.7s, OverallIterations: 8, TraceHistogramMax: 10, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 347 SDslu, 380 SDs, 0 SdLazy, 2269 SolverSat, 511 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 122 PreInvPairs, 145 NumberOfFragments, 95 HoareAnnotationTreeSize, 122 FomulaSimplifications, 20968 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1009 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 633 NumberOfCodeBlocks, 582 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 619 ConstructedInterpolants, 0 QuantifiedInterpolants, 65429 SizeOfPredicates, 19 NumberOfNonLiveVariables, 996 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 776/948 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...