java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-835382a-m [2018-04-05 16:43:37,053 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-05 16:43:37,056 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-05 16:43:37,115 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-05 16:43:37,119 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-05 16:43:37,120 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-05 16:43:37,121 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-05 16:43:37,143 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-05 16:43:37,145 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-05 16:43:37,146 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-05 16:43:37,159 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-05 16:43:37,159 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-05 16:43:37,160 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-05 16:43:37,162 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-05 16:43:37,176 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-05 16:43:37,188 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-05 16:43:37,190 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-05 16:43:37,196 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-05 16:43:37,197 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-05 16:43:37,199 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-05 16:43:37,220 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-04-05 16:43:37,241 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-05 16:43:37,241 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-05 16:43:37,242 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf [2018-04-05 16:43:37,331 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-05 16:43:37,336 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-05 16:43:37,336 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-04-05 16:43:37,337 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-04-05 16:43:37,337 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-04-05 16:43:37,338 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-04-05 16:43:37,338 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-04-05 16:43:37,338 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-04-05 16:43:37,338 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-04-05 16:43:37,339 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-04-05 16:43:37,339 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-04-05 16:43:37,340 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-05 16:43:37,340 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-05 16:43:37,340 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-05 16:43:37,340 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-05 16:43:37,340 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-05 16:43:37,341 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-05 16:43:37,341 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-05 16:43:37,341 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-04-05 16:43:37,341 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-05 16:43:37,341 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-05 16:43:37,347 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-05 16:43:37,347 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-04-05 16:43:37,347 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-04-05 16:43:37,347 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-05 16:43:37,348 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-05 16:43:37,348 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-05 16:43:37,348 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-05 16:43:37,348 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-05 16:43:37,349 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-04-05 16:43:37,349 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-04-05 16:43:37,349 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:37,349 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-04-05 16:43:37,351 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-04-05 16:43:37,351 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-04-05 16:43:37,351 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-04-05 16:43:37,351 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-04-05 16:43:37,489 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-05 16:43:37,537 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-05 16:43:37,546 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-05 16:43:37,548 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-05 16:43:37,554 INFO L276 PluginConnector]: CDTParser initialized [2018-04-05 16:43:37,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i [2018-04-05 16:43:38,131 INFO L225 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGc7fa63880 [2018-04-05 16:43:38,497 INFO L287 CDTParser]: IsIndexed: true [2018-04-05 16:43:38,497 INFO L288 CDTParser]: Found 1 translation units. [2018-04-05 16:43:38,498 INFO L168 CDTParser]: Scanning standard_strcpy_false-valid-deref_ground.i [2018-04-05 16:43:38,499 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-05 16:43:38,500 INFO L215 ultiparseSymbolTable]: [2018-04-05 16:43:38,503 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-05 16:43:38,503 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert ('__VERIFIER_assert') in standard_strcpy_false-valid-deref_ground.i [2018-04-05 16:43:38,503 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in standard_strcpy_false-valid-deref_ground.i [2018-04-05 16:43:38,503 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-05 16:43:38,503 INFO L233 ultiparseSymbolTable]: [2018-04-05 16:43:38,544 INFO L330 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGc7fa63880 [2018-04-05 16:43:38,557 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-05 16:43:38,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-05 16:43:38,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-05 16:43:38,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-05 16:43:38,585 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-05 16:43:38,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:43:38" (1/1) ... [2018-04-05 16:43:38,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40129445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:38, skipping insertion in model container [2018-04-05 16:43:38,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:43:38" (1/1) ... [2018-04-05 16:43:38,625 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-05 16:43:38,660 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-05 16:43:38,983 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-05 16:43:39,029 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-05 16:43:39,039 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 5 non ball SCCs. Number of states in SCCs 5. [2018-04-05 16:43:39,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39 WrapperNode [2018-04-05 16:43:39,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-05 16:43:39,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-05 16:43:39,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-05 16:43:39,052 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-05 16:43:39,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... [2018-04-05 16:43:39,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-05 16:43:39,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-05 16:43:39,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-05 16:43:39,090 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-05 16:43:39,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (1/1) ... No working directory specified, using /storage/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 [2018-04-05 16:43:39,213 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-05 16:43:39,221 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-05 16:43:39,222 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert [2018-04-05 16:43:39,222 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-05 16:43:39,222 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-04-05 16:43:39,222 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert [2018-04-05 16:43:39,222 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-05 16:43:39,223 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-05 16:43:39,223 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-05 16:43:39,806 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-05 16:43:39,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:43:39 BoogieIcfgContainer [2018-04-05 16:43:39,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-05 16:43:39,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-05 16:43:39,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-05 16:43:39,812 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-05 16:43:39,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:43:38" (1/3) ... [2018-04-05 16:43:39,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af64f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:43:39, skipping insertion in model container [2018-04-05 16:43:39,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:43:39" (2/3) ... [2018-04-05 16:43:39,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af64f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:43:39, skipping insertion in model container [2018-04-05 16:43:39,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:43:39" (3/3) ... [2018-04-05 16:43:39,821 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_strcpy_false-valid-deref_ground.i [2018-04-05 16:43:39,848 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-05 16:43:39,872 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-04-05 16:43:39,960 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-05 16:43:39,961 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-05 16:43:39,961 INFO L370 AbstractCegarLoop]: Hoare is true [2018-04-05 16:43:39,961 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-05 16:43:39,962 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-05 16:43:39,962 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-05 16:43:39,962 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-05 16:43:39,962 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-05 16:43:39,962 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-05 16:43:39,963 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-05 16:43:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-04-05 16:43:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-04-05 16:43:40,037 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:40,038 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:40,038 INFO L408 AbstractCegarLoop]: === Iteration 1 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 442952750, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:40,095 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:40,148 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:40,200 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:40,338 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-05 16:43:40,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-04-05 16:43:40,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-05 16:43:40,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-05 16:43:40,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-05 16:43:40,379 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2018-04-05 16:43:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:40,696 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2018-04-05 16:43:40,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-05 16:43:40,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-04-05 16:43:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:40,733 INFO L225 Difference]: With dead ends: 108 [2018-04-05 16:43:40,733 INFO L226 Difference]: Without dead ends: 71 [2018-04-05 16:43:40,750 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-05 16:43:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-04-05 16:43:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2018-04-05 16:43:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-04-05 16:43:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-04-05 16:43:40,852 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 9 [2018-04-05 16:43:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:40,858 INFO L459 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-04-05 16:43:40,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-05 16:43:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-04-05 16:43:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-04-05 16:43:40,867 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:40,867 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:40,867 INFO L408 AbstractCegarLoop]: === Iteration 2 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1498590240, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:40,900 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:40,944 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:40,970 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:41,162 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-05 16:43:41,163 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-04-05 16:43:41,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-05 16:43:41,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-05 16:43:41,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-05 16:43:41,166 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2018-04-05 16:43:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:41,263 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-04-05 16:43:41,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-05 16:43:41,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-04-05 16:43:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:41,270 INFO L225 Difference]: With dead ends: 54 [2018-04-05 16:43:41,270 INFO L226 Difference]: Without dead ends: 52 [2018-04-05 16:43:41,271 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-05 16:43:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-04-05 16:43:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2018-04-05 16:43:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-04-05 16:43:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2018-04-05 16:43:41,312 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 15 [2018-04-05 16:43:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:41,312 INFO L459 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2018-04-05 16:43:41,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-05 16:43:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2018-04-05 16:43:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-04-05 16:43:41,314 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:41,314 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:41,314 INFO L408 AbstractCegarLoop]: === Iteration 3 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:41,315 INFO L82 PathProgramCache]: Analyzing trace with hash -554303570, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:41,335 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:41,355 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:41,432 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:41,779 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:41,780 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-04-05 16:43:41,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-05 16:43:41,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-05 16:43:41,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-04-05 16:43:41,781 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 8 states. [2018-04-05 16:43:42,245 WARN L151 SmtUtils]: Spent 111ms on a formula simplification. DAG size of input: 16 DAG size of output 6 [2018-04-05 16:43:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:42,590 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2018-04-05 16:43:42,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-05 16:43:42,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-04-05 16:43:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:42,607 INFO L225 Difference]: With dead ends: 178 [2018-04-05 16:43:42,607 INFO L226 Difference]: Without dead ends: 175 [2018-04-05 16:43:42,612 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-04-05 16:43:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-04-05 16:43:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 77. [2018-04-05 16:43:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-04-05 16:43:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2018-04-05 16:43:42,651 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 23 [2018-04-05 16:43:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:42,652 INFO L459 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2018-04-05 16:43:42,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-05 16:43:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2018-04-05 16:43:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-04-05 16:43:42,660 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:42,660 INFO L355 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] [2018-04-05 16:43:42,661 INFO L408 AbstractCegarLoop]: === Iteration 4 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1357875333, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:42,684 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:42,729 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:43,081 WARN L148 SmtUtils]: Spent 169ms on a formula simplification that was a NOOP. DAG size: 6 [2018-04-05 16:43:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-05 16:43:43,101 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-04-05 16:43:43,653 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-05 16:43:43,653 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-04-05 16:43:43,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-05 16:43:43,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-05 16:43:43,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-04-05 16:43:43,654 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 5 states. [2018-04-05 16:43:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:43,840 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2018-04-05 16:43:43,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-05 16:43:43,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-04-05 16:43:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:43,845 INFO L225 Difference]: With dead ends: 97 [2018-04-05 16:43:43,845 INFO L226 Difference]: Without dead ends: 77 [2018-04-05 16:43:43,848 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-04-05 16:43:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-04-05 16:43:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-04-05 16:43:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-04-05 16:43:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-04-05 16:43:43,879 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 27 [2018-04-05 16:43:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:43,880 INFO L459 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-04-05 16:43:43,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-05 16:43:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-04-05 16:43:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-04-05 16:43:43,883 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:43,883 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:43,883 INFO L408 AbstractCegarLoop]: === Iteration 5 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:43,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1112537975, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:43,921 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:43,959 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:44,486 WARN L148 SmtUtils]: Spent 109ms on a formula simplification that was a NOOP. DAG size: 7 [2018-04-05 16:43:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:44,622 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:44,930 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:44,930 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-04-05 16:43:44,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-04-05 16:43:44,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-04-05 16:43:44,932 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-04-05 16:43:44,932 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 10 states. [2018-04-05 16:43:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:45,420 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2018-04-05 16:43:45,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-05 16:43:45,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-04-05 16:43:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:45,422 INFO L225 Difference]: With dead ends: 103 [2018-04-05 16:43:45,422 INFO L226 Difference]: Without dead ends: 77 [2018-04-05 16:43:45,426 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-04-05 16:43:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-04-05 16:43:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-04-05 16:43:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-04-05 16:43:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2018-04-05 16:43:45,471 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 34 [2018-04-05 16:43:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:45,471 INFO L459 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2018-04-05 16:43:45,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-04-05 16:43:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2018-04-05 16:43:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-04-05 16:43:45,473 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:45,473 INFO L355 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:45,473 INFO L408 AbstractCegarLoop]: === Iteration 6 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 707836933, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:45,502 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:45,547 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-04-05 16:43:45,639 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-04-05 16:43:46,097 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:46,097 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-04-05 16:43:46,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-05 16:43:46,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-05 16:43:46,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-04-05 16:43:46,099 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 8 states. [2018-04-05 16:43:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:46,558 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2018-04-05 16:43:46,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-05 16:43:46,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-04-05 16:43:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:46,560 INFO L225 Difference]: With dead ends: 98 [2018-04-05 16:43:46,561 INFO L226 Difference]: Without dead ends: 96 [2018-04-05 16:43:46,561 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-04-05 16:43:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-04-05 16:43:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-04-05 16:43:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-04-05 16:43:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2018-04-05 16:43:46,605 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 41 [2018-04-05 16:43:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:46,605 INFO L459 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2018-04-05 16:43:46,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-05 16:43:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2018-04-05 16:43:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-04-05 16:43:46,611 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:46,611 INFO L355 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:46,611 INFO L408 AbstractCegarLoop]: === Iteration 7 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 835962542, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:46,647 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:46,692 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:47,002 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:47,782 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:47,782 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-04-05 16:43:47,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-05 16:43:47,784 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-05 16:43:47,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-04-05 16:43:47,785 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 16 states. [2018-04-05 16:43:48,927 WARN L151 SmtUtils]: Spent 106ms on a formula simplification. DAG size of input: 36 DAG size of output 6 [2018-04-05 16:43:49,149 WARN L151 SmtUtils]: Spent 136ms on a formula simplification. DAG size of input: 31 DAG size of output 6 [2018-04-05 16:43:49,842 WARN L151 SmtUtils]: Spent 150ms on a formula simplification. DAG size of input: 21 DAG size of output 6 [2018-04-05 16:43:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:50,842 INFO L93 Difference]: Finished difference Result 538 states and 610 transitions. [2018-04-05 16:43:50,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-04-05 16:43:50,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2018-04-05 16:43:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:50,861 INFO L225 Difference]: With dead ends: 538 [2018-04-05 16:43:50,861 INFO L226 Difference]: Without dead ends: 535 [2018-04-05 16:43:50,862 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2018-04-05 16:43:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2018-04-05 16:43:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 149. [2018-04-05 16:43:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-04-05 16:43:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2018-04-05 16:43:50,957 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 51 [2018-04-05 16:43:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:50,957 INFO L459 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2018-04-05 16:43:50,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-05 16:43:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2018-04-05 16:43:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-04-05 16:43:50,964 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:50,964 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2018-04-05 16:43:50,964 INFO L408 AbstractCegarLoop]: === Iteration 8 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:50,964 INFO L82 PathProgramCache]: Analyzing trace with hash 476702287, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:50,988 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:51,023 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-04-05 16:43:51,401 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-04-05 16:43:51,877 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:51,877 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-04-05 16:43:51,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-04-05 16:43:51,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-04-05 16:43:51,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-04-05 16:43:51,879 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand 15 states. [2018-04-05 16:43:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:52,522 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2018-04-05 16:43:52,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-05 16:43:52,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2018-04-05 16:43:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:52,528 INFO L225 Difference]: With dead ends: 185 [2018-04-05 16:43:52,529 INFO L226 Difference]: Without dead ends: 149 [2018-04-05 16:43:52,530 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2018-04-05 16:43:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-04-05 16:43:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-04-05 16:43:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-04-05 16:43:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2018-04-05 16:43:52,560 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 65 [2018-04-05 16:43:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:52,561 INFO L459 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2018-04-05 16:43:52,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-04-05 16:43:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2018-04-05 16:43:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-04-05 16:43:52,568 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:52,568 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:52,569 INFO L408 AbstractCegarLoop]: === Iteration 9 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1796128941, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:52,586 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:52,649 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-04-05 16:43:53,331 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-04-05 16:43:54,187 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:54,187 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-04-05 16:43:54,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-04-05 16:43:54,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-04-05 16:43:54,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-04-05 16:43:54,191 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand 20 states. [2018-04-05 16:43:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:55,277 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2018-04-05 16:43:55,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-04-05 16:43:55,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2018-04-05 16:43:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:55,280 INFO L225 Difference]: With dead ends: 191 [2018-04-05 16:43:55,281 INFO L226 Difference]: Without dead ends: 149 [2018-04-05 16:43:55,288 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2018-04-05 16:43:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-04-05 16:43:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-04-05 16:43:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-04-05 16:43:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2018-04-05 16:43:55,311 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 72 [2018-04-05 16:43:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:55,311 INFO L459 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2018-04-05 16:43:55,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-04-05 16:43:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2018-04-05 16:43:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-04-05 16:43:55,314 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:55,314 INFO L355 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:55,314 INFO L408 AbstractCegarLoop]: === Iteration 10 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1364690481, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:55,346 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:55,369 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-04-05 16:43:55,747 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:43:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-04-05 16:43:56,461 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:43:56,461 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-04-05 16:43:56,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-05 16:43:56,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-05 16:43:56,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-04-05 16:43:56,463 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 16 states. [2018-04-05 16:43:58,720 WARN L148 SmtUtils]: Spent 244ms on a formula simplification that was a NOOP. DAG size: 12 [2018-04-05 16:43:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:43:58,958 INFO L93 Difference]: Finished difference Result 186 states and 210 transitions. [2018-04-05 16:43:58,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-05 16:43:58,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-04-05 16:43:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:43:58,961 INFO L225 Difference]: With dead ends: 186 [2018-04-05 16:43:58,961 INFO L226 Difference]: Without dead ends: 184 [2018-04-05 16:43:58,967 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2018-04-05 16:43:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-04-05 16:43:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2018-04-05 16:43:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-04-05 16:43:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 198 transitions. [2018-04-05 16:43:59,006 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 198 transitions. Word has length 79 [2018-04-05 16:43:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:43:59,007 INFO L459 AbstractCegarLoop]: Abstraction has 181 states and 198 transitions. [2018-04-05 16:43:59,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-05 16:43:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 198 transitions. [2018-04-05 16:43:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-04-05 16:43:59,014 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:43:59,014 INFO L355 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:43:59,014 INFO L408 AbstractCegarLoop]: === Iteration 11 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:43:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash 212718766, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:43:59,037 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:43:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:43:59,096 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:43:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:43:59,951 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:44:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:44:02,596 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:44:02,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-04-05 16:44:02,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-05 16:44:02,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-05 16:44:02,598 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2018-04-05 16:44:02,598 INFO L87 Difference]: Start difference. First operand 181 states and 198 transitions. Second operand 32 states. [2018-04-05 16:44:06,745 WARN L151 SmtUtils]: Spent 184ms on a formula simplification. DAG size of input: 76 DAG size of output 6 [2018-04-05 16:44:07,050 WARN L151 SmtUtils]: Spent 146ms on a formula simplification. DAG size of input: 71 DAG size of output 6 [2018-04-05 16:44:07,504 WARN L151 SmtUtils]: Spent 169ms on a formula simplification. DAG size of input: 66 DAG size of output 6 [2018-04-05 16:44:07,786 WARN L151 SmtUtils]: Spent 130ms on a formula simplification. DAG size of input: 61 DAG size of output 6 [2018-04-05 16:44:08,107 WARN L151 SmtUtils]: Spent 145ms on a formula simplification. DAG size of input: 56 DAG size of output 6 [2018-04-05 16:44:08,384 WARN L151 SmtUtils]: Spent 104ms on a formula simplification. DAG size of input: 51 DAG size of output 6 [2018-04-05 16:44:08,948 WARN L151 SmtUtils]: Spent 123ms on a formula simplification. DAG size of input: 41 DAG size of output 6 [2018-04-05 16:44:09,241 WARN L151 SmtUtils]: Spent 105ms on a formula simplification. DAG size of input: 36 DAG size of output 6 [2018-04-05 16:44:09,544 WARN L151 SmtUtils]: Spent 106ms on a formula simplification. DAG size of input: 31 DAG size of output 6 [2018-04-05 16:44:09,877 WARN L151 SmtUtils]: Spent 111ms on a formula simplification. DAG size of input: 26 DAG size of output 6 [2018-04-05 16:44:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:44:13,615 INFO L93 Difference]: Finished difference Result 1962 states and 2222 transitions. [2018-04-05 16:44:13,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-04-05 16:44:13,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 107 [2018-04-05 16:44:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:44:13,648 INFO L225 Difference]: With dead ends: 1962 [2018-04-05 16:44:13,648 INFO L226 Difference]: Without dead ends: 1959 [2018-04-05 16:44:13,651 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2018-04-05 16:44:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2018-04-05 16:44:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 293. [2018-04-05 16:44:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-05 16:44:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 326 transitions. [2018-04-05 16:44:13,770 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 326 transitions. Word has length 107 [2018-04-05 16:44:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:44:13,770 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 326 transitions. [2018-04-05 16:44:13,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-05 16:44:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 326 transitions. [2018-04-05 16:44:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-04-05 16:44:13,773 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:44:13,773 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:44:13,773 INFO L408 AbstractCegarLoop]: === Iteration 12 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:44:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1443326877, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:44:13,803 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:44:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:44:13,834 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:44:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 210 proven. 54 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-04-05 16:44:14,911 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:44:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 162 proven. 54 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-04-05 16:44:16,668 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:44:16,669 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2018-04-05 16:44:16,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-05 16:44:16,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-05 16:44:16,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2018-04-05 16:44:16,670 INFO L87 Difference]: Start difference. First operand 293 states and 326 transitions. Second operand 25 states. [2018-04-05 16:44:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:44:19,180 INFO L93 Difference]: Finished difference Result 361 states and 400 transitions. [2018-04-05 16:44:19,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-04-05 16:44:19,181 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2018-04-05 16:44:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:44:19,183 INFO L225 Difference]: With dead ends: 361 [2018-04-05 16:44:19,184 INFO L226 Difference]: Without dead ends: 293 [2018-04-05 16:44:19,188 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 225 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-04-05 16:44:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-04-05 16:44:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-04-05 16:44:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-05 16:44:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 325 transitions. [2018-04-05 16:44:19,282 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 325 transitions. Word has length 127 [2018-04-05 16:44:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:44:19,282 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 325 transitions. [2018-04-05 16:44:19,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-05 16:44:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 325 transitions. [2018-04-05 16:44:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-04-05 16:44:19,293 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:44:19,293 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:44:19,293 INFO L408 AbstractCegarLoop]: === Iteration 13 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:44:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1820836249, now seen corresponding path program 7 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:44:19,330 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:44:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:44:19,402 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:44:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 219 proven. 85 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-04-05 16:44:20,820 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:44:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 179 proven. 85 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-04-05 16:44:22,707 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:44:22,707 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2018-04-05 16:44:22,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-04-05 16:44:22,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-04-05 16:44:22,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2018-04-05 16:44:22,709 INFO L87 Difference]: Start difference. First operand 293 states and 325 transitions. Second operand 30 states. [2018-04-05 16:44:23,853 WARN L148 SmtUtils]: Spent 186ms on a formula simplification that was a NOOP. DAG size: 9 [2018-04-05 16:44:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:44:25,118 INFO L93 Difference]: Finished difference Result 361 states and 399 transitions. [2018-04-05 16:44:25,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-04-05 16:44:25,119 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 134 [2018-04-05 16:44:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:44:25,121 INFO L225 Difference]: With dead ends: 361 [2018-04-05 16:44:25,121 INFO L226 Difference]: Without dead ends: 293 [2018-04-05 16:44:25,123 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 233 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2018-04-05 16:44:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-04-05 16:44:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-04-05 16:44:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-05 16:44:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 324 transitions. [2018-04-05 16:44:25,147 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 324 transitions. Word has length 134 [2018-04-05 16:44:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:44:25,148 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 324 transitions. [2018-04-05 16:44:25,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-04-05 16:44:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 324 transitions. [2018-04-05 16:44:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-04-05 16:44:25,151 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:44:25,151 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:44:25,151 INFO L408 AbstractCegarLoop]: === Iteration 14 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:44:25,151 INFO L82 PathProgramCache]: Analyzing trace with hash -194377757, now seen corresponding path program 8 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:44:25,173 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:44:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:44:25,223 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:44:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 212 proven. 123 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-04-05 16:44:26,851 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:44:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 188 proven. 123 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-04-05 16:44:28,801 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:44:28,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2018-04-05 16:44:28,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-04-05 16:44:28,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-04-05 16:44:28,803 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2018-04-05 16:44:28,803 INFO L87 Difference]: Start difference. First operand 293 states and 324 transitions. Second operand 35 states. [2018-04-05 16:44:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:44:32,466 INFO L93 Difference]: Finished difference Result 361 states and 398 transitions. [2018-04-05 16:44:32,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-04-05 16:44:32,467 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 141 [2018-04-05 16:44:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:44:32,469 INFO L225 Difference]: With dead ends: 361 [2018-04-05 16:44:32,469 INFO L226 Difference]: Without dead ends: 293 [2018-04-05 16:44:32,472 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 241 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=504, Invalid=1658, Unknown=0, NotChecked=0, Total=2162 [2018-04-05 16:44:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-04-05 16:44:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-04-05 16:44:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-05 16:44:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 323 transitions. [2018-04-05 16:44:32,530 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 323 transitions. Word has length 141 [2018-04-05 16:44:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:44:32,530 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 323 transitions. [2018-04-05 16:44:32,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-04-05 16:44:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 323 transitions. [2018-04-05 16:44:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-04-05 16:44:32,532 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:44:32,533 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:44:32,542 INFO L408 AbstractCegarLoop]: === Iteration 15 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:44:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash -274343193, now seen corresponding path program 9 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:44:32,588 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:44:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:44:32,659 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:44:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 189 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-04-05 16:44:34,873 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:44:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 189 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-04-05 16:44:37,345 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:44:37,345 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-04-05 16:44:37,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-04-05 16:44:37,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-04-05 16:44:37,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2018-04-05 16:44:37,347 INFO L87 Difference]: Start difference. First operand 293 states and 323 transitions. Second operand 40 states. [2018-04-05 16:44:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:44:41,072 INFO L93 Difference]: Finished difference Result 367 states and 404 transitions. [2018-04-05 16:44:41,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-04-05 16:44:41,073 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 148 [2018-04-05 16:44:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:44:41,075 INFO L225 Difference]: With dead ends: 367 [2018-04-05 16:44:41,075 INFO L226 Difference]: Without dead ends: 293 [2018-04-05 16:44:41,078 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 249 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=653, Invalid=2209, Unknown=0, NotChecked=0, Total=2862 [2018-04-05 16:44:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-04-05 16:44:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-04-05 16:44:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-05 16:44:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 322 transitions. [2018-04-05 16:44:41,122 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 322 transitions. Word has length 148 [2018-04-05 16:44:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:44:41,122 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 322 transitions. [2018-04-05 16:44:41,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-04-05 16:44:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 322 transitions. [2018-04-05 16:44:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-04-05 16:44:41,125 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:44:41,125 INFO L355 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:44:41,125 INFO L408 AbstractCegarLoop]: === Iteration 16 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:44:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash 596335459, now seen corresponding path program 10 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:44:41,188 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:44:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:44:41,227 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:44:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2018-04-05 16:44:42,442 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:44:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2018-04-05 16:44:46,106 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:44:46,106 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-04-05 16:44:46,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-05 16:44:46,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-05 16:44:46,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-04-05 16:44:46,107 INFO L87 Difference]: Start difference. First operand 293 states and 322 transitions. Second operand 32 states. [2018-04-05 16:44:49,054 WARN L151 SmtUtils]: Spent 160ms on a formula simplification. DAG size of input: 60 DAG size of output 12 [2018-04-05 16:44:49,271 WARN L151 SmtUtils]: Spent 114ms on a formula simplification. DAG size of input: 36 DAG size of output 6 [2018-04-05 16:44:49,850 WARN L151 SmtUtils]: Spent 264ms on a formula simplification. DAG size of input: 55 DAG size of output 11 [2018-04-05 16:44:50,464 WARN L151 SmtUtils]: Spent 298ms on a formula simplification. DAG size of input: 52 DAG size of output 12 [2018-04-05 16:44:51,174 WARN L151 SmtUtils]: Spent 226ms on a formula simplification. DAG size of input: 31 DAG size of output 6 [2018-04-05 16:44:51,475 WARN L151 SmtUtils]: Spent 135ms on a formula simplification. DAG size of input: 47 DAG size of output 11 [2018-04-05 16:44:52,253 WARN L151 SmtUtils]: Spent 306ms on a formula simplification. DAG size of input: 44 DAG size of output 12 [2018-04-05 16:44:53,191 WARN L151 SmtUtils]: Spent 577ms on a formula simplification. DAG size of input: 39 DAG size of output 11 [2018-04-05 16:44:53,448 WARN L151 SmtUtils]: Spent 109ms on a formula simplification. DAG size of input: 36 DAG size of output 12 [2018-04-05 16:44:53,937 WARN L151 SmtUtils]: Spent 327ms on a formula simplification. DAG size of input: 21 DAG size of output 6 [2018-04-05 16:44:54,894 WARN L151 SmtUtils]: Spent 569ms on a formula simplification. DAG size of input: 31 DAG size of output 11 [2018-04-05 16:44:55,293 WARN L151 SmtUtils]: Spent 121ms on a formula simplification. DAG size of input: 28 DAG size of output 12 [2018-04-05 16:44:55,839 WARN L151 SmtUtils]: Spent 101ms on a formula simplification. DAG size of input: 23 DAG size of output 11 [2018-04-05 16:44:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:44:57,018 INFO L93 Difference]: Finished difference Result 362 states and 414 transitions. [2018-04-05 16:44:57,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-05 16:44:57,018 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 155 [2018-04-05 16:44:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:44:57,021 INFO L225 Difference]: With dead ends: 362 [2018-04-05 16:44:57,021 INFO L226 Difference]: Without dead ends: 360 [2018-04-05 16:44:57,037 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-04-05 16:44:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2018-04-05 16:44:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 357. [2018-04-05 16:44:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-04-05 16:44:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 394 transitions. [2018-04-05 16:44:57,149 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 394 transitions. Word has length 155 [2018-04-05 16:44:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:44:57,150 INFO L459 AbstractCegarLoop]: Abstraction has 357 states and 394 transitions. [2018-04-05 16:44:57,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-05 16:44:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 394 transitions. [2018-04-05 16:44:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-04-05 16:44:57,171 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:44:57,172 INFO L355 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:44:57,172 INFO L408 AbstractCegarLoop]: === Iteration 17 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:44:57,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2010902702, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:44:57,202 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:44:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:44:57,277 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:45:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:45:00,722 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:45:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-05 16:45:13,989 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:45:13,989 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-04-05 16:45:13,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-05 16:45:13,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-05 16:45:13,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2018-04-05 16:45:13,992 INFO L87 Difference]: Start difference. First operand 357 states and 394 transitions. Second operand 64 states. [2018-04-05 16:45:32,935 WARN L151 SmtUtils]: Spent 417ms on a formula simplification. DAG size of input: 156 DAG size of output 6 [2018-04-05 16:45:33,763 WARN L151 SmtUtils]: Spent 325ms on a formula simplification. DAG size of input: 151 DAG size of output 6 [2018-04-05 16:45:34,990 WARN L151 SmtUtils]: Spent 635ms on a formula simplification. DAG size of input: 146 DAG size of output 6 [2018-04-05 16:45:35,949 WARN L151 SmtUtils]: Spent 370ms on a formula simplification. DAG size of input: 141 DAG size of output 6 [2018-04-05 16:45:37,030 WARN L151 SmtUtils]: Spent 354ms on a formula simplification. DAG size of input: 136 DAG size of output 6 [2018-04-05 16:45:37,914 WARN L151 SmtUtils]: Spent 230ms on a formula simplification. DAG size of input: 131 DAG size of output 6 [2018-04-05 16:45:38,452 WARN L151 SmtUtils]: Spent 241ms on a formula simplification. DAG size of input: 126 DAG size of output 6 [2018-04-05 16:45:39,249 WARN L151 SmtUtils]: Spent 291ms on a formula simplification. DAG size of input: 121 DAG size of output 6 [2018-04-05 16:45:40,051 WARN L151 SmtUtils]: Spent 218ms on a formula simplification. DAG size of input: 116 DAG size of output 6 [2018-04-05 16:45:41,507 WARN L151 SmtUtils]: Spent 746ms on a formula simplification. DAG size of input: 111 DAG size of output 6 [2018-04-05 16:45:42,430 WARN L151 SmtUtils]: Spent 307ms on a formula simplification. DAG size of input: 106 DAG size of output 6 [2018-04-05 16:45:43,126 WARN L151 SmtUtils]: Spent 221ms on a formula simplification. DAG size of input: 101 DAG size of output 6 [2018-04-05 16:45:43,843 WARN L151 SmtUtils]: Spent 274ms on a formula simplification. DAG size of input: 96 DAG size of output 6 [2018-04-05 16:45:44,736 WARN L151 SmtUtils]: Spent 209ms on a formula simplification. DAG size of input: 91 DAG size of output 6 [2018-04-05 16:45:45,517 WARN L151 SmtUtils]: Spent 220ms on a formula simplification. DAG size of input: 86 DAG size of output 6 [2018-04-05 16:45:46,715 WARN L151 SmtUtils]: Spent 146ms on a formula simplification. DAG size of input: 81 DAG size of output 6 [2018-04-05 16:45:47,547 WARN L151 SmtUtils]: Spent 483ms on a formula simplification. DAG size of input: 76 DAG size of output 6 [2018-04-05 16:45:48,082 WARN L151 SmtUtils]: Spent 138ms on a formula simplification. DAG size of input: 71 DAG size of output 6 [2018-04-05 16:45:48,677 WARN L151 SmtUtils]: Spent 213ms on a formula simplification. DAG size of input: 66 DAG size of output 6 [2018-04-05 16:45:49,790 WARN L151 SmtUtils]: Spent 115ms on a formula simplification. DAG size of input: 61 DAG size of output 6 [2018-04-05 16:45:50,266 WARN L151 SmtUtils]: Spent 112ms on a formula simplification. DAG size of input: 56 DAG size of output 6 [2018-04-05 16:45:50,722 WARN L151 SmtUtils]: Spent 100ms on a formula simplification. DAG size of input: 51 DAG size of output 6 [2018-04-05 16:45:51,242 WARN L151 SmtUtils]: Spent 104ms on a formula simplification. DAG size of input: 46 DAG size of output 6 [2018-04-05 16:45:52,632 WARN L151 SmtUtils]: Spent 109ms on a formula simplification. DAG size of input: 31 DAG size of output 6 [2018-04-05 16:46:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:46:02,673 INFO L93 Difference]: Finished difference Result 7498 states and 8470 transitions. [2018-04-05 16:46:02,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-04-05 16:46:02,673 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 219 [2018-04-05 16:46:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:46:02,731 INFO L225 Difference]: With dead ends: 7498 [2018-04-05 16:46:02,731 INFO L226 Difference]: Without dead ends: 7495 [2018-04-05 16:46:02,737 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2018-04-05 16:46:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7495 states. [2018-04-05 16:46:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7495 to 581. [2018-04-05 16:46:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:46:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 650 transitions. [2018-04-05 16:46:03,128 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 650 transitions. Word has length 219 [2018-04-05 16:46:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:46:03,133 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 650 transitions. [2018-04-05 16:46:03,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-05 16:46:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 650 transitions. [2018-04-05 16:46:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-04-05 16:46:03,135 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:46:03,136 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:46:03,136 INFO L408 AbstractCegarLoop]: === Iteration 18 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:46:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1912252555, now seen corresponding path program 11 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:46:03,181 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:46:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:46:03,308 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:46:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 934 proven. 220 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2018-04-05 16:46:05,696 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:46:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 710 proven. 220 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-04-05 16:46:08,906 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:46:08,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 45 [2018-04-05 16:46:08,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-04-05 16:46:08,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-04-05 16:46:08,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-04-05 16:46:08,908 INFO L87 Difference]: Start difference. First operand 581 states and 650 transitions. Second operand 45 states. [2018-04-05 16:46:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:46:12,375 INFO L93 Difference]: Finished difference Result 713 states and 796 transitions. [2018-04-05 16:46:12,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-04-05 16:46:12,376 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 251 [2018-04-05 16:46:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:46:12,379 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:46:12,379 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:46:12,381 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 449 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=821, Invalid=2839, Unknown=0, NotChecked=0, Total=3660 [2018-04-05 16:46:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:46:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:46:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:46:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 649 transitions. [2018-04-05 16:46:12,550 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 649 transitions. Word has length 251 [2018-04-05 16:46:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:46:12,551 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 649 transitions. [2018-04-05 16:46:12,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-04-05 16:46:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 649 transitions. [2018-04-05 16:46:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-04-05 16:46:12,553 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:46:12,554 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:46:12,558 INFO L408 AbstractCegarLoop]: === Iteration 19 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:46:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash -922504049, now seen corresponding path program 12 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:46:12,612 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:46:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:46:12,733 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:46:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 975 proven. 279 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-04-05 16:46:16,048 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:46:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 759 proven. 279 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2018-04-05 16:46:20,729 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:46:20,729 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 50 [2018-04-05 16:46:20,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-04-05 16:46:20,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-04-05 16:46:20,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2027, Unknown=0, NotChecked=0, Total=2450 [2018-04-05 16:46:20,731 INFO L87 Difference]: Start difference. First operand 581 states and 649 transitions. Second operand 50 states. [2018-04-05 16:46:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:46:26,818 INFO L93 Difference]: Finished difference Result 713 states and 795 transitions. [2018-04-05 16:46:26,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-04-05 16:46:26,819 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 258 [2018-04-05 16:46:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:46:26,822 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:46:26,822 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:46:26,830 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 457 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1008, Invalid=3548, Unknown=0, NotChecked=0, Total=4556 [2018-04-05 16:46:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:46:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:46:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:46:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 648 transitions. [2018-04-05 16:46:27,002 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 648 transitions. Word has length 258 [2018-04-05 16:46:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:46:27,003 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 648 transitions. [2018-04-05 16:46:27,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-04-05 16:46:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 648 transitions. [2018-04-05 16:46:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-04-05 16:46:27,009 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:46:27,009 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:46:27,010 INFO L408 AbstractCegarLoop]: === Iteration 20 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:46:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1400495115, now seen corresponding path program 13 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:46:27,055 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:46:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:46:27,181 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:46:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 1000 proven. 345 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2018-04-05 16:46:30,706 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:46:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 800 proven. 345 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2018-04-05 16:46:38,663 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:46:38,664 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 55 [2018-04-05 16:46:38,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-05 16:46:38,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-05 16:46:38,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2018-04-05 16:46:38,666 INFO L87 Difference]: Start difference. First operand 581 states and 648 transitions. Second operand 55 states. [2018-04-05 16:46:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:46:46,243 INFO L93 Difference]: Finished difference Result 713 states and 794 transitions. [2018-04-05 16:46:46,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-04-05 16:46:46,244 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 265 [2018-04-05 16:46:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:46:46,247 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:46:46,247 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:46:46,255 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 465 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1214, Invalid=4336, Unknown=0, NotChecked=0, Total=5550 [2018-04-05 16:46:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:46:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:46:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:46:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 647 transitions. [2018-04-05 16:46:46,437 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 647 transitions. Word has length 265 [2018-04-05 16:46:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:46:46,437 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 647 transitions. [2018-04-05 16:46:46,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-05 16:46:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 647 transitions. [2018-04-05 16:46:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-04-05 16:46:46,441 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:46:46,442 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:46:46,442 INFO L408 AbstractCegarLoop]: === Iteration 21 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:46:46,442 INFO L82 PathProgramCache]: Analyzing trace with hash -685010673, now seen corresponding path program 14 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:46:46,466 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:46:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:46:46,564 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:46:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1723 backedges. 1009 proven. 418 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2018-04-05 16:46:51,419 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:46:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1723 backedges. 833 proven. 418 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-04-05 16:46:56,021 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:46:56,022 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 60 [2018-04-05 16:46:56,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-04-05 16:46:56,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-04-05 16:46:56,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=2948, Unknown=0, NotChecked=0, Total=3540 [2018-04-05 16:46:56,024 INFO L87 Difference]: Start difference. First operand 581 states and 647 transitions. Second operand 60 states. [2018-04-05 16:47:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:47:02,607 INFO L93 Difference]: Finished difference Result 713 states and 793 transitions. [2018-04-05 16:47:02,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-04-05 16:47:02,616 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 272 [2018-04-05 16:47:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:47:02,620 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:47:02,625 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:47:02,628 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 473 SyntacticMatches, 12 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1439, Invalid=5203, Unknown=0, NotChecked=0, Total=6642 [2018-04-05 16:47:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:47:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:47:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:47:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 646 transitions. [2018-04-05 16:47:02,780 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 646 transitions. Word has length 272 [2018-04-05 16:47:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:47:02,780 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 646 transitions. [2018-04-05 16:47:02,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-04-05 16:47:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 646 transitions. [2018-04-05 16:47:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-04-05 16:47:02,786 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:47:02,786 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:47:02,786 INFO L408 AbstractCegarLoop]: === Iteration 22 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:47:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -828838005, now seen corresponding path program 15 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:47:02,824 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:47:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:47:02,957 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:47:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 1002 proven. 498 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-04-05 16:47:07,880 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:47:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 858 proven. 498 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2018-04-05 16:47:13,707 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:47:13,707 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 65 [2018-04-05 16:47:13,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-04-05 16:47:13,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-04-05 16:47:13,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=3473, Unknown=0, NotChecked=0, Total=4160 [2018-04-05 16:47:13,709 INFO L87 Difference]: Start difference. First operand 581 states and 646 transitions. Second operand 65 states. [2018-04-05 16:47:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:47:22,269 INFO L93 Difference]: Finished difference Result 713 states and 792 transitions. [2018-04-05 16:47:22,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-04-05 16:47:22,272 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 279 [2018-04-05 16:47:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:47:22,275 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:47:22,275 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:47:22,277 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 481 SyntacticMatches, 13 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1683, Invalid=6149, Unknown=0, NotChecked=0, Total=7832 [2018-04-05 16:47:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:47:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:47:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:47:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 645 transitions. [2018-04-05 16:47:22,417 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 645 transitions. Word has length 279 [2018-04-05 16:47:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:47:22,417 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 645 transitions. [2018-04-05 16:47:22,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-04-05 16:47:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 645 transitions. [2018-04-05 16:47:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-04-05 16:47:22,422 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:47:22,422 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:47:22,422 INFO L408 AbstractCegarLoop]: === Iteration 23 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:47:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash 303533455, now seen corresponding path program 16 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:47:22,447 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:47:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:47:22,561 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:47:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 979 proven. 585 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-04-05 16:47:28,203 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:47:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 875 proven. 585 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-04-05 16:47:34,583 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:47:34,583 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 70 [2018-04-05 16:47:34,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-04-05 16:47:34,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-04-05 16:47:34,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=4041, Unknown=0, NotChecked=0, Total=4830 [2018-04-05 16:47:34,586 INFO L87 Difference]: Start difference. First operand 581 states and 645 transitions. Second operand 70 states. [2018-04-05 16:47:40,092 WARN L148 SmtUtils]: Spent 101ms on a formula simplification that was a NOOP. DAG size: 9 [2018-04-05 16:47:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:47:42,527 INFO L93 Difference]: Finished difference Result 713 states and 791 transitions. [2018-04-05 16:47:42,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-04-05 16:47:42,528 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 286 [2018-04-05 16:47:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:47:42,531 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:47:42,531 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:47:42,533 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 489 SyntacticMatches, 14 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1946, Invalid=7174, Unknown=0, NotChecked=0, Total=9120 [2018-04-05 16:47:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:47:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:47:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:47:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 644 transitions. [2018-04-05 16:47:42,635 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 644 transitions. Word has length 286 [2018-04-05 16:47:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:47:42,635 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 644 transitions. [2018-04-05 16:47:42,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-04-05 16:47:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 644 transitions. [2018-04-05 16:47:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-04-05 16:47:42,644 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:47:42,644 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:47:42,644 INFO L408 AbstractCegarLoop]: === Iteration 24 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:47:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash 504357643, now seen corresponding path program 17 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:47:42,703 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:47:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:47:42,763 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:47:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 940 proven. 679 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-04-05 16:47:48,307 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:47:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 884 proven. 679 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-04-05 16:47:58,994 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:47:58,995 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 75 [2018-04-05 16:47:58,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-04-05 16:47:58,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-04-05 16:47:58,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=898, Invalid=4652, Unknown=0, NotChecked=0, Total=5550 [2018-04-05 16:47:58,997 INFO L87 Difference]: Start difference. First operand 581 states and 644 transitions. Second operand 75 states. [2018-04-05 16:48:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:48:09,193 INFO L93 Difference]: Finished difference Result 713 states and 790 transitions. [2018-04-05 16:48:09,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-04-05 16:48:09,193 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 293 [2018-04-05 16:48:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:48:09,197 INFO L225 Difference]: With dead ends: 713 [2018-04-05 16:48:09,197 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:48:09,199 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 497 SyntacticMatches, 15 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=2228, Invalid=8278, Unknown=0, NotChecked=0, Total=10506 [2018-04-05 16:48:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:48:09,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:48:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:48:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 643 transitions. [2018-04-05 16:48:09,320 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 643 transitions. Word has length 293 [2018-04-05 16:48:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:48:09,321 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 643 transitions. [2018-04-05 16:48:09,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-04-05 16:48:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 643 transitions. [2018-04-05 16:48:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-04-05 16:48:09,333 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:48:09,333 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:48:09,333 INFO L408 AbstractCegarLoop]: === Iteration 25 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:48:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1074768399, now seen corresponding path program 18 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:48:09,362 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:48:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:48:09,473 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:48:12,017 WARN L148 SmtUtils]: Spent 153ms on a formula simplification that was a NOOP. DAG size: 7 [2018-04-05 16:48:13,315 WARN L148 SmtUtils]: Spent 122ms on a formula simplification that was a NOOP. DAG size: 7 [2018-04-05 16:48:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 885 proven. 780 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-04-05 16:48:18,292 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:48:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 885 proven. 780 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-04-05 16:48:28,454 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:48:28,454 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 80 [2018-04-05 16:48:28,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-04-05 16:48:28,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-04-05 16:48:28,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=5306, Unknown=0, NotChecked=0, Total=6320 [2018-04-05 16:48:28,456 INFO L87 Difference]: Start difference. First operand 581 states and 643 transitions. Second operand 80 states. [2018-04-05 16:48:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-05 16:48:42,755 INFO L93 Difference]: Finished difference Result 719 states and 796 transitions. [2018-04-05 16:48:42,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-04-05 16:48:42,756 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 300 [2018-04-05 16:48:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-05 16:48:42,759 INFO L225 Difference]: With dead ends: 719 [2018-04-05 16:48:42,759 INFO L226 Difference]: Without dead ends: 581 [2018-04-05 16:48:42,773 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 505 SyntacticMatches, 16 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=2529, Invalid=9461, Unknown=0, NotChecked=0, Total=11990 [2018-04-05 16:48:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2018-04-05 16:48:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2018-04-05 16:48:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2018-04-05 16:48:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 642 transitions. [2018-04-05 16:48:42,910 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 642 transitions. Word has length 300 [2018-04-05 16:48:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-05 16:48:42,910 INFO L459 AbstractCegarLoop]: Abstraction has 581 states and 642 transitions. [2018-04-05 16:48:42,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-04-05 16:48:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 642 transitions. [2018-04-05 16:48:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-04-05 16:48:42,920 INFO L347 BasicCegarLoop]: Found error trace [2018-04-05 16:48:42,920 INFO L355 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-05 16:48:42,920 INFO L408 AbstractCegarLoop]: === Iteration 26 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-05 16:48:42,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1519826571, now seen corresponding path program 19 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-05 16:48:42,957 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-05 16:48:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-05 16:48:43,112 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-05 16:48:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2018-04-05 16:48:46,970 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-05 16:48:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2018-04-05 16:48:57,875 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-05 16:48:57,875 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-04-05 16:48:57,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-05 16:48:57,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-05 16:48:57,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-04-05 16:48:57,877 INFO L87 Difference]: Start difference. First operand 581 states and 642 transitions. Second operand 64 states. [2018-04-05 16:49:10,299 WARN L151 SmtUtils]: Spent 181ms on a formula simplification. DAG size of input: 80 DAG size of output 11 [2018-04-05 16:49:11,745 WARN L151 SmtUtils]: Spent 1065ms on a formula simplification. DAG size of input: 124 DAG size of output 12 [2018-04-05 16:49:12,143 WARN L151 SmtUtils]: Spent 138ms on a formula simplification. DAG size of input: 76 DAG size of output 6 [2018-04-05 16:49:12,707 WARN L151 SmtUtils]: Spent 294ms on a formula simplification. DAG size of input: 119 DAG size of output 11 [2018-04-05 16:49:13,509 WARN L151 SmtUtils]: Spent 381ms on a formula simplification. DAG size of input: 116 DAG size of output 12 [2018-04-05 16:49:14,029 WARN L151 SmtUtils]: Spent 173ms on a formula simplification. DAG size of input: 71 DAG size of output 6 [2018-04-05 16:49:14,913 WARN L151 SmtUtils]: Spent 423ms on a formula simplification. DAG size of input: 111 DAG size of output 11 [2018-04-05 16:49:15,745 WARN L151 SmtUtils]: Spent 367ms on a formula simplification. DAG size of input: 108 DAG size of output 12 [2018-04-05 16:49:16,139 WARN L151 SmtUtils]: Spent 153ms on a formula simplification. DAG size of input: 66 DAG size of output 6 [2018-04-05 16:49:17,088 WARN L151 SmtUtils]: Spent 287ms on a formula simplification. DAG size of input: 103 DAG size of output 11 [2018-04-05 16:49:17,792 WARN L151 SmtUtils]: Spent 257ms on a formula simplification. DAG size of input: 100 DAG size of output 12 [2018-04-05 16:49:18,147 WARN L151 SmtUtils]: Spent 103ms on a formula simplification. DAG size of input: 61 DAG size of output 6 [2018-04-05 16:49:18,866 WARN L151 SmtUtils]: Spent 301ms on a formula simplification. DAG size of input: 95 DAG size of output 11 [2018-04-05 16:49:19,535 WARN L151 SmtUtils]: Spent 253ms on a formula simplification. DAG size of input: 92 DAG size of output 12 [2018-04-05 16:49:20,078 WARN L151 SmtUtils]: Spent 159ms on a formula simplification. DAG size of input: 56 DAG size of output 6 [2018-04-05 16:49:20,764 WARN L151 SmtUtils]: Spent 232ms on a formula simplification. DAG size of input: 87 DAG size of output 11 [2018-04-05 16:49:21,401 WARN L151 SmtUtils]: Spent 221ms on a formula simplification. DAG size of input: 84 DAG size of output 12 [2018-04-05 16:49:22,345 WARN L151 SmtUtils]: Spent 242ms on a formula simplification. DAG size of input: 79 DAG size of output 11 [2018-04-05 16:49:22,901 WARN L151 SmtUtils]: Spent 207ms on a formula simplification. DAG size of input: 76 DAG size of output 12