/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:11:15,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:11:15,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:11:15,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:11:15,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:11:15,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:11:15,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:11:15,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:11:15,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:11:15,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:11:15,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:11:15,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:11:15,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:11:15,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:11:15,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:11:15,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:11:15,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:11:15,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:11:15,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:11:15,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:11:15,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:11:15,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:11:15,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:11:15,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:11:15,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:11:15,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:11:15,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:11:15,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:11:15,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:11:15,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:11:15,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:11:15,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:11:15,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:11:15,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:11:15,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:11:15,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:11:15,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:11:15,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:11:15,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:11:15,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:11:15,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:11:15,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:11:15,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:11:15,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:11:15,417 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:11:15,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:11:15,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:11:15,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:11:15,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:11:15,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:11:15,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:11:15,418 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:11:15,735 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:11:15,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:11:15,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:11:15,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:11:15,761 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:11:15,762 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-07 13:11:15,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249c8640e/6f20ce70348743629dddbdcc19167e3f/FLAG23ff44431 [2020-07-07 13:11:16,427 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:11:16,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-07 13:11:16,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249c8640e/6f20ce70348743629dddbdcc19167e3f/FLAG23ff44431 [2020-07-07 13:11:16,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249c8640e/6f20ce70348743629dddbdcc19167e3f [2020-07-07 13:11:16,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:11:16,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:11:16,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:11:16,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:11:16,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:11:16,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:11:16" (1/1) ... [2020-07-07 13:11:16,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e8576f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:16, skipping insertion in model container [2020-07-07 13:11:16,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:11:16" (1/1) ... [2020-07-07 13:11:16,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:11:16,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:11:17,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:11:17,046 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:11:17,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:11:17,074 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:11:17,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17 WrapperNode [2020-07-07 13:11:17,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:11:17,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:11:17,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:11:17,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:11:17,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (1/1) ... [2020-07-07 13:11:17,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:11:17,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:11:17,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:11:17,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:11:17,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (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 [2020-07-07 13:11:17,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:11:17,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:11:17,261 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 13:11:17,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:11:17,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:11:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:11:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 13:11:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:11:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:11:17,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:11:17,445 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:11:17,445 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:11:17,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:11:17 BoogieIcfgContainer [2020-07-07 13:11:17,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:11:17,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:11:17,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:11:17,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:11:17,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:11:16" (1/3) ... [2020-07-07 13:11:17,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9a6106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:11:17, skipping insertion in model container [2020-07-07 13:11:17,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:11:17" (2/3) ... [2020-07-07 13:11:17,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9a6106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:11:17, skipping insertion in model container [2020-07-07 13:11:17,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:11:17" (3/3) ... [2020-07-07 13:11:17,458 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-07-07 13:11:17,469 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:11:17,476 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:11:17,490 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:11:17,514 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:11:17,514 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:11:17,514 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:11:17,514 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:11:17,515 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:11:17,515 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:11:17,515 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:11:17,515 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:11:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-07 13:11:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:11:17,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:11:17,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:11:17,544 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:11:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:11:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-07 13:11:17,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:11:17,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181058212] [2020-07-07 13:11:17,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:11:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:11:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:11:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:11:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:11:17,780 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:11:17,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181058212] [2020-07-07 13:11:17,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:11:17,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:11:17,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854338363] [2020-07-07 13:11:17,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:11:17,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:11:17,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:11:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:11:17,825 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-07 13:11:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:11:17,944 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-07 13:11:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:11:17,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:11:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:11:17,956 INFO L225 Difference]: With dead ends: 37 [2020-07-07 13:11:17,956 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 13:11:17,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:11:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 13:11:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 13:11:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 13:11:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-07 13:11:18,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-07 13:11:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:11:18,013 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-07 13:11:18,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:11:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-07 13:11:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 13:11:18,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:11:18,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:11:18,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:11:18,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:11:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:11:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-07 13:11:18,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:11:18,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490468375] [2020-07-07 13:11:18,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY