/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:52:40,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:52:40,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:52:40,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:52:40,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:52:40,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:52:40,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:52:40,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:52:40,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:52:40,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:52:40,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:52:40,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:52:40,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:52:40,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:52:40,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:52:40,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:52:40,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:52:40,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:52:40,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:52:40,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:52:40,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:52:40,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:52:40,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:52:40,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:52:40,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:52:40,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:52:40,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:52:40,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:52:40,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:52:40,179 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:52:40,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:52:40,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:52:40,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:52:40,185 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:52:40,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:52:40,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:52:40,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:52:40,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:52:40,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:52:40,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:52:40,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:52:40,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:52:40,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:52:40,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:52:40,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:52:40,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:52:40,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:52:40,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:52:40,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:52:40,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:52:40,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:52:40,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:52:40,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:52:40,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:52:40,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:52:40,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:52:40,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:52:40,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:52:40,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:52:40,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:52:40,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:52:40,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:52:40,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:52:40,518 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:52:40,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 17:52:40,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7ae343b4/32ebe52776e94e4a9224277d24345ce4/FLAG586016db0 [2020-08-18 17:52:41,095 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:52:41,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 17:52:41,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7ae343b4/32ebe52776e94e4a9224277d24345ce4/FLAG586016db0 [2020-08-18 17:52:41,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7ae343b4/32ebe52776e94e4a9224277d24345ce4 [2020-08-18 17:52:41,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:52:41,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:52:41,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:52:41,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:52:41,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:52:41,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26da8024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41, skipping insertion in model container [2020-08-18 17:52:41,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:52:41,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:52:41,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:52:41,721 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:52:41,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:52:41,749 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:52:41,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41 WrapperNode [2020-08-18 17:52:41,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:52:41,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:52:41,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:52:41,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:52:41,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... [2020-08-18 17:52:41,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:52:41,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:52:41,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:52:41,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:52:41,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 17:52:41,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:52:41,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:52:41,966 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 17:52:41,966 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 17:52:41,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:52:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 17:52:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:52:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 17:52:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 17:52:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:52:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:52:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:52:42,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:52:42,185 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:52:42,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:52:42 BoogieIcfgContainer [2020-08-18 17:52:42,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:52:42,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:52:42,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:52:42,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:52:42,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:52:41" (1/3) ... [2020-08-18 17:52:42,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86edb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:52:42, skipping insertion in model container [2020-08-18 17:52:42,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:52:41" (2/3) ... [2020-08-18 17:52:42,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86edb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:52:42, skipping insertion in model container [2020-08-18 17:52:42,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:52:42" (3/3) ... [2020-08-18 17:52:42,200 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-18 17:52:42,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:52:42,224 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:52:42,260 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:52:42,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:52:42,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:52:42,297 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:52:42,297 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:52:42,297 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:52:42,298 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:52:42,298 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:52:42,298 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:52:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 17:52:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 17:52:42,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:42,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:42,336 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 17:52:42,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:42,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381757843] [2020-08-18 17:52:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:42,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:42,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:52:42,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381757843] [2020-08-18 17:52:42,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:52:42,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:52:42,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244130805] [2020-08-18 17:52:42,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:52:42,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:52:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:52:42,711 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 17:52:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:42,788 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 17:52:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:52:42,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 17:52:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:42,812 INFO L225 Difference]: With dead ends: 40 [2020-08-18 17:52:42,813 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 17:52:42,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:52:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 17:52:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 17:52:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 17:52:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 17:52:42,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 17:52:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:42,869 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 17:52:42,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:52:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 17:52:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:52:42,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:42,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:42,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:52:42,873 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 17:52:42,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:42,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390455610] [2020-08-18 17:52:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:42,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:42,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:52:43,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390455610] [2020-08-18 17:52:43,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:52:43,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:52:43,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448208607] [2020-08-18 17:52:43,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:52:43,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:52:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:52:43,034 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 17:52:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:43,053 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 17:52:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:52:43,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 17:52:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:43,056 INFO L225 Difference]: With dead ends: 32 [2020-08-18 17:52:43,056 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 17:52:43,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:52:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 17:52:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 17:52:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 17:52:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 17:52:43,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 17:52:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:43,065 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 17:52:43,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:52:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 17:52:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:52:43,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:43,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:43,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:52:43,068 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 17:52:43,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:43,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188725481] [2020-08-18 17:52:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:52:43,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188725481] [2020-08-18 17:52:43,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:52:43,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:52:43,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353546961] [2020-08-18 17:52:43,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:52:43,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:43,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:52:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:52:43,333 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 17:52:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:43,430 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 17:52:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:52:43,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 17:52:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:43,434 INFO L225 Difference]: With dead ends: 48 [2020-08-18 17:52:43,434 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 17:52:43,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:52:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 17:52:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 17:52:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 17:52:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 17:52:43,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 17:52:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:43,455 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 17:52:43,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:52:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 17:52:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:52:43,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:43,461 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, 1, 1, 1] [2020-08-18 17:52:43,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:52:43,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 17:52:43,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:43,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624304729] [2020-08-18 17:52:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:52:43,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624304729] [2020-08-18 17:52:43,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:52:43,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:52:43,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531487175] [2020-08-18 17:52:43,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:52:43,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:52:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:52:43,601 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 17:52:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:43,641 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 17:52:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:52:43,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 17:52:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:43,643 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:52:43,643 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:52:43,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:52:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:52:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 17:52:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 17:52:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 17:52:43,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 17:52:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:43,652 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 17:52:43,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:52:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 17:52:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:52:43,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:43,654 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, 1, 1, 1] [2020-08-18 17:52:43,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:52:43,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 17:52:43,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:43,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059513314] [2020-08-18 17:52:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:52:43,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059513314] [2020-08-18 17:52:43,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:52:43,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:52:43,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092347708] [2020-08-18 17:52:43,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:52:43,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:52:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:52:43,875 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 17:52:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:43,977 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-18 17:52:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:52:43,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 17:52:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:43,979 INFO L225 Difference]: With dead ends: 64 [2020-08-18 17:52:43,979 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 17:52:43,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:52:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 17:52:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-18 17:52:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 17:52:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 17:52:43,988 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 17:52:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:43,989 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 17:52:43,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:52:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 17:52:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:52:43,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:43,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:43,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:52:43,991 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 17:52:43,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:43,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211035094] [2020-08-18 17:52:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 17:52:44,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211035094] [2020-08-18 17:52:44,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:52:44,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:52:44,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967536309] [2020-08-18 17:52:44,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:52:44,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:44,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:52:44,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:52:44,271 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-18 17:52:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:44,432 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-18 17:52:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:52:44,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-18 17:52:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:44,435 INFO L225 Difference]: With dead ends: 72 [2020-08-18 17:52:44,435 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 17:52:44,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:52:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 17:52:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-18 17:52:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 17:52:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-18 17:52:44,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-18 17:52:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:44,445 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-18 17:52:44,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:52:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-18 17:52:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 17:52:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:44,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:44,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:52:44,448 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 17:52:44,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:44,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407238329] [2020-08-18 17:52:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-18 17:52:44,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407238329] [2020-08-18 17:52:44,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:52:44,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:52:44,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638080858] [2020-08-18 17:52:44,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:52:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:52:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:52:44,828 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-18 17:52:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:45,030 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-18 17:52:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:52:45,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-18 17:52:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:45,032 INFO L225 Difference]: With dead ends: 80 [2020-08-18 17:52:45,032 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 17:52:45,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:52:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 17:52:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-18 17:52:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 17:52:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 17:52:45,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-18 17:52:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:45,041 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 17:52:45,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:52:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 17:52:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 17:52:45,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:45,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:45,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:52:45,045 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:45,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-18 17:52:45,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:45,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628451420] [2020-08-18 17:52:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 17:52:45,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628451420] [2020-08-18 17:52:45,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:52:45,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 17:52:45,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472031430] [2020-08-18 17:52:45,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 17:52:45,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 17:52:45,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:52:45,517 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-18 17:52:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:45,789 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-18 17:52:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:52:45,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-18 17:52:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:45,791 INFO L225 Difference]: With dead ends: 90 [2020-08-18 17:52:45,792 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 17:52:45,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:52:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 17:52:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-18 17:52:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 17:52:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-18 17:52:45,800 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-18 17:52:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:45,800 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-18 17:52:45,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 17:52:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-18 17:52:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 17:52:45,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:45,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:45,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:52:45,803 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-18 17:52:45,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:45,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313322878] [2020-08-18 17:52:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:45,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 17:52:46,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313322878] [2020-08-18 17:52:46,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:52:46,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 17:52:46,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072672671] [2020-08-18 17:52:46,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 17:52:46,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 17:52:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:52:46,277 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-18 17:52:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:46,571 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-18 17:52:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:52:46,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-18 17:52:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:46,573 INFO L225 Difference]: With dead ends: 94 [2020-08-18 17:52:46,573 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 17:52:46,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:52:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 17:52:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-18 17:52:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 17:52:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-18 17:52:46,595 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-18 17:52:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:46,598 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-18 17:52:46,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 17:52:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-18 17:52:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:52:46,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:52:46,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:52:46,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:52:46,604 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:52:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:52:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-18 17:52:46,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:52:46,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849991301] [2020-08-18 17:52:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:52:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:52:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:52:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:46,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:47,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:47,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:47,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:52:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:52:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-18 17:52:47,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849991301] [2020-08-18 17:52:47,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:52:47,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 17:52:47,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657368601] [2020-08-18 17:52:47,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 17:52:47,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:52:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 17:52:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:52:47,316 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-18 17:52:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:52:47,598 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-18 17:52:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:52:47,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-18 17:52:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:52:47,599 INFO L225 Difference]: With dead ends: 82 [2020-08-18 17:52:47,599 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:52:47,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:52:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:52:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:52:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:52:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:52:47,602 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-18 17:52:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:52:47,602 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:52:47,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 17:52:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:52:47,602 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:52:47,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:52:47,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:52:47,629 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:52:47,630 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:52:47,630 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 17:52:47,630 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 17:52:47,630 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 17:52:47,630 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 17:52:47,630 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 17:52:47,630 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 17:52:47,631 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 17:52:47,631 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:52:47,631 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:52:47,631 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:52:47,631 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:52:47,631 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 17:52:47,632 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 17:52:47,632 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 17:52:47,632 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 17:52:47,632 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 17:52:47,632 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 17:52:47,632 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 17:52:47,632 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 17:52:47,632 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 17:52:47,633 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 17:52:47,633 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 17:52:47,633 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 17:52:47,633 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 17:52:47,633 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 17:52:47,633 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 17:52:47,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:52:47 BoogieIcfgContainer [2020-08-18 17:52:47,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:52:47,642 INFO L168 Benchmark]: Toolchain (without parser) took 6136.01 ms. Allocated memory was 140.0 MB in the beginning and 279.4 MB in the end (delta: 139.5 MB). Free memory was 103.5 MB in the beginning and 194.3 MB in the end (delta: -90.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:52:47,643 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:52:47,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.12 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:52:47,645 INFO L168 Benchmark]: Boogie Preprocessor took 131.55 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.6 MB in the beginning and 182.5 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:52:47,645 INFO L168 Benchmark]: RCFGBuilder took 307.40 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:52:47,646 INFO L168 Benchmark]: TraceAbstraction took 5447.42 ms. Allocated memory was 203.4 MB in the beginning and 279.4 MB in the end (delta: 76.0 MB). Free memory was 169.1 MB in the beginning and 194.3 MB in the end (delta: -25.1 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:52:47,649 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.12 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.55 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.6 MB in the beginning and 182.5 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 307.40 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5447.42 ms. Allocated memory was 203.4 MB in the beginning and 279.4 MB in the end (delta: 76.0 MB). Free memory was 169.1 MB in the beginning and 194.3 MB in the end (delta: -25.1 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 58 SDslu, 3296 SDs, 0 SdLazy, 1115 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, 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, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 50267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 118/206 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...