/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:32,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:32,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:32,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:01:32,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:32,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:32,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:32,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:32,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:32,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:32,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:32,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:32,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:32,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:32,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:32,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:32,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:01:32,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:32,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:32,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:32,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:01:32,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:32,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:32,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:32,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:32,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:32,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:32,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:32,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:32,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:32,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:32,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:32,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:32,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:32,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:32,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:32,970 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:32,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:32,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:32,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:32,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:32,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:32,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:32,971 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:01:33,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:33,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:33,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:33,317 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:33,318 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:33,318 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-08-22 23:01:33,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9c15b81/455578195bf14cdc856ed0ce1bab03ef/FLAG6388e4392 [2020-08-22 23:01:33,804 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:33,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-08-22 23:01:33,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9c15b81/455578195bf14cdc856ed0ce1bab03ef/FLAG6388e4392 [2020-08-22 23:01:34,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9c15b81/455578195bf14cdc856ed0ce1bab03ef [2020-08-22 23:01:34,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:34,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:34,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:34,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:34,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:34,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477ebec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34, skipping insertion in model container [2020-08-22 23:01:34,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:34,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:34,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:34,424 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:34,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:34,449 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:34,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34 WrapperNode [2020-08-22 23:01:34,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:34,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:34,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:34,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:34,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (1/1) ... [2020-08-22 23:01:34,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:34,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:34,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:34,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:34,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (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 [2020-08-22 23:01:34,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:34,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:01:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:01:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:34,814 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:34,814 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:01:34,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:34 BoogieIcfgContainer [2020-08-22 23:01:34,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:34,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:34,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:34,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:34,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:34" (1/3) ... [2020-08-22 23:01:34,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e180683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:34, skipping insertion in model container [2020-08-22 23:01:34,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:34" (2/3) ... [2020-08-22 23:01:34,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e180683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:34, skipping insertion in model container [2020-08-22 23:01:34,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:34" (3/3) ... [2020-08-22 23:01:34,828 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-08-22 23:01:34,840 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:34,848 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:34,870 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:34,901 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:34,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:34,901 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:34,902 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:34,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:34,902 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:34,902 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:34,903 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-22 23:01:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 23:01:34,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:34,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:34,937 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash 129992897, now seen corresponding path program 1 times [2020-08-22 23:01:34,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:34,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239261253] [2020-08-22 23:01:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:35,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239261253] [2020-08-22 23:01:35,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:35,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:01:35,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879870288] [2020-08-22 23:01:35,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:01:35,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:01:35,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:01:35,101 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-08-22 23:01:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:35,129 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-08-22 23:01:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:01:35,131 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-08-22 23:01:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:35,152 INFO L225 Difference]: With dead ends: 34 [2020-08-22 23:01:35,152 INFO L226 Difference]: Without dead ends: 17 [2020-08-22 23:01:35,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:01:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-22 23:01:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-22 23:01:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 23:01:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 23:01:35,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2020-08-22 23:01:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:35,224 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 23:01:35,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:01:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 23:01:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 23:01:35,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:35,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:35,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:35,227 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash 121681208, now seen corresponding path program 1 times [2020-08-22 23:01:35,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:35,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193510558] [2020-08-22 23:01:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:35,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193510558] [2020-08-22 23:01:35,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:35,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:01:35,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572216662] [2020-08-22 23:01:35,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:01:35,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:01:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:01:35,295 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-08-22 23:01:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:35,325 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-08-22 23:01:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:01:35,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-22 23:01:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:35,328 INFO L225 Difference]: With dead ends: 26 [2020-08-22 23:01:35,328 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 23:01:35,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:01:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 23:01:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-22 23:01:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 23:01:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-22 23:01:35,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-08-22 23:01:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:35,337 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-22 23:01:35,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:01:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-22 23:01:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 23:01:35,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:35,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:35,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:35,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -917865259, now seen corresponding path program 1 times [2020-08-22 23:01:35,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:35,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252272388] [2020-08-22 23:01:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:35,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252272388] [2020-08-22 23:01:35,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:35,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:01:35,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250700642] [2020-08-22 23:01:35,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:01:35,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:01:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:35,421 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-08-22 23:01:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:35,507 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-08-22 23:01:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:01:35,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-22 23:01:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:35,509 INFO L225 Difference]: With dead ends: 31 [2020-08-22 23:01:35,509 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 23:01:35,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:01:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 23:01:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-08-22 23:01:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 23:01:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 23:01:35,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-08-22 23:01:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:35,521 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 23:01:35,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:01:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 23:01:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 23:01:35,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:35,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:35,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:01:35,524 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:35,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:35,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2060587176, now seen corresponding path program 2 times [2020-08-22 23:01:35,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:35,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312767695] [2020-08-22 23:01:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:35,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312767695] [2020-08-22 23:01:35,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:35,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:01:35,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976487677] [2020-08-22 23:01:35,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:01:35,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:35,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:01:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:01:35,620 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-08-22 23:01:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:35,715 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-22 23:01:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:01:35,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 23:01:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:35,717 INFO L225 Difference]: With dead ends: 36 [2020-08-22 23:01:35,717 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 23:01:35,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:01:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 23:01:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-22 23:01:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 23:01:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-22 23:01:35,726 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-08-22 23:01:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:35,727 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-22 23:01:35,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:01:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-22 23:01:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 23:01:35,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:35,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:35,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:01:35,729 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash 657233589, now seen corresponding path program 3 times [2020-08-22 23:01:35,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:35,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045854534] [2020-08-22 23:01:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:35,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045854534] [2020-08-22 23:01:35,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:35,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:01:35,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410672077] [2020-08-22 23:01:35,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:01:35,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:35,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:01:35,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:01:35,873 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2020-08-22 23:01:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:36,018 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-08-22 23:01:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:01:36,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-22 23:01:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:36,020 INFO L225 Difference]: With dead ends: 41 [2020-08-22 23:01:36,020 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 23:01:36,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:01:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 23:01:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-22 23:01:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 23:01:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-22 23:01:36,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-08-22 23:01:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:36,030 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-22 23:01:36,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:01:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-22 23:01:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 23:01:36,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:36,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:36,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:01:36,032 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1410268808, now seen corresponding path program 4 times [2020-08-22 23:01:36,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:36,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113689179] [2020-08-22 23:01:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:36,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113689179] [2020-08-22 23:01:36,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:36,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:01:36,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139587744] [2020-08-22 23:01:36,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:01:36,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:36,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:01:36,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:01:36,172 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2020-08-22 23:01:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:36,321 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-08-22 23:01:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:01:36,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-22 23:01:36,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:36,323 INFO L225 Difference]: With dead ends: 46 [2020-08-22 23:01:36,323 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 23:01:36,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:01:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 23:01:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-08-22 23:01:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 23:01:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-08-22 23:01:36,332 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-08-22 23:01:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:36,333 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-08-22 23:01:36,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:01:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-08-22 23:01:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 23:01:36,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:36,335 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:36,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:01:36,335 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1340090219, now seen corresponding path program 5 times [2020-08-22 23:01:36,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:36,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315553860] [2020-08-22 23:01:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:36,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315553860] [2020-08-22 23:01:36,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:36,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:01:36,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027310865] [2020-08-22 23:01:36,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:01:36,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:36,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:01:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:01:36,476 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2020-08-22 23:01:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:36,650 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-08-22 23:01:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:01:36,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 23:01:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:36,652 INFO L225 Difference]: With dead ends: 51 [2020-08-22 23:01:36,652 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 23:01:36,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:01:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 23:01:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-08-22 23:01:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 23:01:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-22 23:01:36,661 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-08-22 23:01:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:36,661 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-22 23:01:36,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:01:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-22 23:01:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 23:01:36,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:36,663 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:36,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:01:36,663 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:36,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash 740027288, now seen corresponding path program 6 times [2020-08-22 23:01:36,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:36,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074940247] [2020-08-22 23:01:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:36,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:36,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074940247] [2020-08-22 23:01:36,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:36,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:01:36,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842103148] [2020-08-22 23:01:36,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:01:36,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:36,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:01:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:01:36,889 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 15 states. [2020-08-22 23:01:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:37,118 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-08-22 23:01:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:01:37,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-08-22 23:01:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:37,120 INFO L225 Difference]: With dead ends: 56 [2020-08-22 23:01:37,120 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 23:01:37,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:01:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 23:01:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-08-22 23:01:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 23:01:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-22 23:01:37,129 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-08-22 23:01:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:37,129 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-22 23:01:37,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:01:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-22 23:01:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 23:01:37,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:37,131 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:37,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:01:37,131 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1053966965, now seen corresponding path program 7 times [2020-08-22 23:01:37,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:37,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771612609] [2020-08-22 23:01:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:37,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771612609] [2020-08-22 23:01:37,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:37,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:01:37,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563137798] [2020-08-22 23:01:37,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:01:37,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:37,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:01:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:01:37,318 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 17 states. [2020-08-22 23:01:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:37,582 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-22 23:01:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 23:01:37,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-08-22 23:01:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:37,583 INFO L225 Difference]: With dead ends: 58 [2020-08-22 23:01:37,583 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 23:01:37,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:01:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 23:01:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 23:01:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 23:01:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-08-22 23:01:37,597 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-08-22 23:01:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:37,597 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-08-22 23:01:37,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:01:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-08-22 23:01:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 23:01:37,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:37,599 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:37,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:01:37,599 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:37,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1480544840, now seen corresponding path program 8 times [2020-08-22 23:01:37,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:37,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218032395] [2020-08-22 23:01:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:37,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:37,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218032395] [2020-08-22 23:01:37,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:37,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:01:37,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824930753] [2020-08-22 23:01:37,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:01:37,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:37,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:01:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:01:37,839 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 13 states. [2020-08-22 23:01:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:37,958 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-08-22 23:01:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:01:37,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-22 23:01:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:37,959 INFO L225 Difference]: With dead ends: 64 [2020-08-22 23:01:37,960 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 23:01:37,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:01:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 23:01:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-22 23:01:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 23:01:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-08-22 23:01:37,969 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-08-22 23:01:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:37,969 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-08-22 23:01:37,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:01:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-08-22 23:01:37,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 23:01:37,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:37,971 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:37,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:01:37,971 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:37,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1401826219, now seen corresponding path program 9 times [2020-08-22 23:01:37,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:37,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554705658] [2020-08-22 23:01:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:38,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:38,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554705658] [2020-08-22 23:01:38,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:38,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 23:01:38,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506981047] [2020-08-22 23:01:38,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:01:38,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:38,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:01:38,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:01:38,176 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 19 states. [2020-08-22 23:01:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:38,444 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-22 23:01:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 23:01:38,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-08-22 23:01:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:38,445 INFO L225 Difference]: With dead ends: 58 [2020-08-22 23:01:38,445 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:01:38,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:01:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:01:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:01:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:01:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:01:38,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-08-22 23:01:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:38,449 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:01:38,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:01:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:01:38,449 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:01:38,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:01:38,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:01:39,071 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:01:39,071 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:01:39,071 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:01:39,071 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:01:39,071 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:01:39,072 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:01:39,072 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-08-22 23:01:39,072 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 17) the Hoare annotation is: true [2020-08-22 23:01:39,072 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 0 main_~sn~0) (<= 1 main_~i~0) (<= main_~sn~0 0) (<= main_~i~0 1)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0))) [2020-08-22 23:01:39,073 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 0 main_~sn~0) (<= main_~sn~0 0)) [2020-08-22 23:01:39,073 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 11 17) the Hoare annotation is: true [2020-08-22 23:01:39,073 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-08-22 23:01:39,073 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= main_~i~0 6) (<= 12 main_~sn~0) (<= 6 main_~i~0) (<= main_~sn~0 12)) (and (<= 2 main_~i~0) (<= main_~sn~0 4) (<= main_~i~0 2) (<= 4 main_~sn~0)) (and (<= main_~i~0 8) (<= main_~sn~0 16) (<= 8 main_~i~0) (< 15 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (<= 10 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 10) (<= main_~i~0 5)) (and (<= main_~sn~0 2) (<= 1 main_~i~0) (<= 2 main_~sn~0) (<= main_~i~0 1)) (and (<= main_~i~0 4) (<= main_~sn~0 8) (<= 4 main_~i~0) (<= 8 main_~sn~0))) [2020-08-22 23:01:39,074 INFO L264 CegarLoopResult]: At program point L13-4(line 13) the Hoare annotation is: (or (and (<= 6 |main_#t~post0|) (<= main_~i~0 6) (<= |main_#t~post0| 6) (<= 12 main_~sn~0) (<= 6 main_~i~0) (<= main_~sn~0 12)) (and (<= 2 main_~i~0) (<= |main_#t~post0| 2) (<= main_~sn~0 4) (<= main_~i~0 2) (<= 4 main_~sn~0) (<= 2 |main_#t~post0|)) (and (<= main_~i~0 8) (<= main_~sn~0 16) (<= 8 main_~i~0) (< 15 main_~sn~0) (<= 8 |main_#t~post0|)) (and (<= main_~i~0 4) (<= |main_#t~post0| 4) (<= 4 |main_#t~post0|) (<= main_~sn~0 8) (<= 4 main_~i~0) (<= 8 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 3 main_~i~0) (<= 3 |main_#t~post0|) (<= main_~i~0 3) (<= |main_#t~post0| 3)) (and (<= 5 |main_#t~post0|) (<= 10 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 10) (<= main_~i~0 5) (<= |main_#t~post0| 5)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 7 |main_#t~post0|) (<= |main_#t~post0| 7) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (<= |main_#t~post0| 1) (<= main_~sn~0 2) (<= 1 main_~i~0) (<= 2 main_~sn~0) (<= main_~i~0 1) (<= 1 |main_#t~post0|))) [2020-08-22 23:01:39,074 INFO L264 CegarLoopResult]: At program point L13-5(line 13) the Hoare annotation is: (or (and (<= main_~i~0 8) (<= 7 |main_#t~post0|) (<= 8 main_~i~0) (<= |main_#t~post0| 7) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6) (<= 3 |main_#t~post0|) (<= |main_#t~post0| 3)) (and (<= |main_#t~post0| 2) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0) (<= 2 |main_#t~post0|)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0) (<= 8 |main_#t~post0|)) (and (<= 2 main_~i~0) (<= |main_#t~post0| 1) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2) (<= 1 |main_#t~post0|)) (and (<= main_~i~0 6) (<= 5 |main_#t~post0|) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0) (<= |main_#t~post0| 5)) (and (<= |main_#t~post0| 4) (<= 4 |main_#t~post0|) (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 6 |main_#t~post0|) (<= 7 main_~i~0) (<= main_~i~0 7) (<= |main_#t~post0| 6) (<= 12 main_~sn~0) (<= main_~sn~0 12))) [2020-08-22 23:01:39,074 INFO L264 CegarLoopResult]: At program point L13-6(lines 13 15) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 0 main_~sn~0) (<= 1 main_~i~0) (<= main_~sn~0 0) (<= main_~i~0 1)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0))) [2020-08-22 23:01:39,075 INFO L264 CegarLoopResult]: At program point L13-7(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2020-08-22 23:01:39,075 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 23:01:39,075 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 23:01:39,075 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:01:39,075 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:01:39,075 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:01:39,076 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 23:01:39,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:01:39 BoogieIcfgContainer [2020-08-22 23:01:39,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:01:39,112 INFO L168 Benchmark]: Toolchain (without parser) took 4912.92 ms. Allocated memory was 147.3 MB in the beginning and 271.6 MB in the end (delta: 124.3 MB). Free memory was 104.0 MB in the beginning and 187.6 MB in the end (delta: -83.6 MB). Peak memory consumption was 98.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:39,113 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 122.9 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 23:01:39,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.57 ms. Allocated memory is still 147.3 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:39,118 INFO L168 Benchmark]: Boogie Preprocessor took 110.22 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 94.6 MB in the beginning and 183.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:39,118 INFO L168 Benchmark]: RCFGBuilder took 257.82 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 171.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:39,119 INFO L168 Benchmark]: TraceAbstraction took 4289.29 ms. Allocated memory was 203.9 MB in the beginning and 271.6 MB in the end (delta: 67.6 MB). Free memory was 170.5 MB in the beginning and 187.6 MB in the end (delta: -17.1 MB). Peak memory consumption was 108.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:39,128 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 122.9 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.57 ms. Allocated memory is still 147.3 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.22 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 94.6 MB in the beginning and 183.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.82 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 171.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4289.29 ms. Allocated memory was 203.9 MB in the beginning and 271.6 MB in the end (delta: 67.6 MB). Free memory was 170.5 MB in the beginning and 187.6 MB in the end (delta: -17.1 MB). Peak memory consumption was 108.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((0 <= sn && 1 <= i) && sn <= 0) && i <= 1)) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn) - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 137 SDslu, 954 SDs, 0 SdLazy, 460 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=10, 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, 11 MinimizatonAttempts, 22 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 83 PreInvPairs, 149 NumberOfFragments, 663 HoareAnnotationTreeSize, 83 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 5 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 346 ConstructedInterpolants, 0 QuantifiedInterpolants, 41998 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 189/645 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...