/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_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:08:44,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:08:44,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:08:44,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:08:44,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:08:44,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:08:44,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:08:44,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:08:44,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:08:44,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:08:44,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:08:44,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:08:44,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:08:44,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:08:44,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:08:44,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:08:44,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:08:44,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:08:44,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:08:44,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:08:44,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:08:44,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:08:44,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:08:44,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:08:44,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:08:45,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:08:45,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:08:45,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:08:45,008 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 13:08:45,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:08:45,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:08:45,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:08:45,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:08:45,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:08:45,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:08:45,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:08:45,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:08:45,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:08:45,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:08:45,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:08:45,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:08:45,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:08:45,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:08:45,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:08:45,030 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:08:45,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:08:45,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:08:45,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:08:45,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:08:45,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:08:45,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:08:45,033 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:08:45,346 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:08:45,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:08:45,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:08:45,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:08:45,369 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:08:45,370 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-07 13:08:45,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578149e02/e114ce78d2a44f0391d2b030d5ad15b4/FLAG60f46c51e [2020-07-07 13:08:45,948 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:08:45,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-07 13:08:45,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578149e02/e114ce78d2a44f0391d2b030d5ad15b4/FLAG60f46c51e [2020-07-07 13:08:46,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578149e02/e114ce78d2a44f0391d2b030d5ad15b4 [2020-07-07 13:08:46,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:08:46,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:08:46,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:08:46,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:08:46,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:08:46,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d44950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46, skipping insertion in model container [2020-07-07 13:08:46,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:08:46,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:08:46,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:08:46,515 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:08:46,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:08:46,546 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:08:46,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46 WrapperNode [2020-07-07 13:08:46,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:08:46,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:08:46,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:08:46,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:08:46,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (1/1) ... [2020-07-07 13:08:46,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:08:46,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:08:46,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:08:46,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:08:46,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (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 13:08:46,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:08:46,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:08:46,735 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 13:08:46,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:08:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:08:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:08:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 13:08:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:08:46,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:08:46,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:08:46,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:08:46,930 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:08:46,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:08:46 BoogieIcfgContainer [2020-07-07 13:08:46,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:08:46,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:08:46,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:08:46,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:08:46,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:08:46" (1/3) ... [2020-07-07 13:08:46,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca38369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:08:46, skipping insertion in model container [2020-07-07 13:08:46,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:08:46" (2/3) ... [2020-07-07 13:08:46,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca38369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:08:46, skipping insertion in model container [2020-07-07 13:08:46,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:08:46" (3/3) ... [2020-07-07 13:08:46,944 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-07-07 13:08:46,956 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:08:46,964 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:08:46,976 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:08:46,999 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:08:46,999 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:08:47,000 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:08:47,000 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:08:47,000 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:08:47,000 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:08:47,000 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:08:47,001 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:08:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-07 13:08:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:08:47,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:08:47,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:08:47,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:08:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:08:47,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-07 13:08:47,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:08:47,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019208730] [2020-07-07 13:08:47,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:08:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:08:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:08:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:08:47,253 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 13:08:47,254 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:08:47,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019208730] [2020-07-07 13:08:47,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:08:47,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:08:47,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414880969] [2020-07-07 13:08:47,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:08:47,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:08:47,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:08:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:08:47,290 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-07 13:08:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:08:47,566 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-07 13:08:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:08:47,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:08:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:08:47,580 INFO L225 Difference]: With dead ends: 37 [2020-07-07 13:08:47,581 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 13:08:47,585 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 13:08:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 13:08:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 13:08:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 13:08:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-07 13:08:47,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-07 13:08:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:08:47,641 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-07 13:08:47,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:08:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-07 13:08:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 13:08:47,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:08:47,644 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 13:08:47,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:08:47,645 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:08:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:08:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-07 13:08:47,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:08:47,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463264445] [2020-07-07 13:08:47,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY