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 --cacsl2boogietranslator.bitprecise.bitfields false -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-408c70d-m [2018-04-12 10:53:20,560 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-12 10:53:20,561 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-12 10:53:20,575 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-12 10:53:20,575 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-12 10:53:20,576 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-12 10:53:20,577 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-12 10:53:20,579 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-12 10:53:20,580 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-12 10:53:20,581 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-12 10:53:20,582 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-12 10:53:20,582 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-12 10:53:20,583 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-12 10:53:20,584 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-12 10:53:20,585 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-12 10:53:20,586 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-12 10:53:20,588 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-12 10:53:20,589 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-12 10:53:20,590 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-12 10:53:20,591 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-12 10:53:20,593 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-12 10:53:20,593 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-12 10:53:20,593 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-12 10:53:20,594 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-12 10:53:20,595 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-12 10:53:20,596 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-12 10:53:20,596 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-12 10:53:20,596 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-12 10:53:20,597 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-12 10:53:20,597 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-12 10:53:20,598 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-12 10:53:20,598 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-04-12 10:53:20,607 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-12 10:53:20,608 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-12 10:53:20,609 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-04-12 10:53:20,609 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-04-12 10:53:20,609 INFO L133 SettingsManager]: * Use SBE=true [2018-04-12 10:53:20,609 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-12 10:53:20,609 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-12 10:53:20,609 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-12 10:53:20,610 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-12 10:53:20,610 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-12 10:53:20,610 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-12 10:53:20,610 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-12 10:53:20,610 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-04-12 10:53:20,610 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-12 10:53:20,611 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-12 10:53:20,611 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-12 10:53:20,611 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-04-12 10:53:20,611 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-04-12 10:53:20,611 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-12 10:53:20,611 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-12 10:53:20,611 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-12 10:53:20,612 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-12 10:53:20,612 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-12 10:53:20,612 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Bitprecise bitfields -> false [2018-04-12 10:53:20,641 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-12 10:53:20,651 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-12 10:53:20,655 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-12 10:53:20,656 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-12 10:53:20,656 INFO L276 PluginConnector]: CDTParser initialized [2018-04-12 10:53:20,657 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i [2018-04-12 10:53:21,032 INFO L225 CDTParser]: Created temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG21a711f2b [2018-04-12 10:53:21,115 INFO L287 CDTParser]: IsIndexed: true [2018-04-12 10:53:21,115 INFO L288 CDTParser]: Found 1 translation units. [2018-04-12 10:53:21,115 INFO L168 CDTParser]: Scanning standard_strcpy_false-valid-deref_ground.i [2018-04-12 10:53:21,116 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-12 10:53:21,116 INFO L215 ultiparseSymbolTable]: [2018-04-12 10:53:21,116 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-12 10:53:21,116 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert ('__VERIFIER_assert') in standard_strcpy_false-valid-deref_ground.i [2018-04-12 10:53:21,116 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in standard_strcpy_false-valid-deref_ground.i [2018-04-12 10:53:21,116 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-12 10:53:21,116 INFO L233 ultiparseSymbolTable]: [2018-04-12 10:53:21,127 INFO L330 CDTParser]: Deleted temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG21a711f2b [2018-04-12 10:53:21,131 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-12 10:53:21,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-12 10:53:21,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-12 10:53:21,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-12 10:53:21,136 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-12 10:53:21,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ced703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21, skipping insertion in model container [2018-04-12 10:53:21,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,150 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-12 10:53:21,159 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-12 10:53:21,262 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-12 10:53:21,273 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-12 10:53:21,277 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 5 non ball SCCs. Number of states in SCCs 5. [2018-04-12 10:53:21,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21 WrapperNode [2018-04-12 10:53:21,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-12 10:53:21,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-12 10:53:21,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-12 10:53:21,283 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-12 10:53:21,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... [2018-04-12 10:53:21,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-12 10:53:21,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-12 10:53:21,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-12 10:53:21,303 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-12 10:53:21,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-04-12 10:53:21,336 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-12 10:53:21,336 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-12 10:53:21,336 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert [2018-04-12 10:53:21,336 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-12 10:53:21,336 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-04-12 10:53:21,336 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert [2018-04-12 10:53:21,336 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-12 10:53:21,336 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-12 10:53:21,336 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-12 10:53:21,476 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-12 10:53:21,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.04 10:53:21 BoogieIcfgContainer [2018-04-12 10:53:21,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-12 10:53:21,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-12 10:53:21,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-12 10:53:21,480 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-12 10:53:21,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.04 10:53:21" (1/3) ... [2018-04-12 10:53:21,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df9027f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.04 10:53:21, skipping insertion in model container [2018-04-12 10:53:21,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 10:53:21" (2/3) ... [2018-04-12 10:53:21,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df9027f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.04 10:53:21, skipping insertion in model container [2018-04-12 10:53:21,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.04 10:53:21" (3/3) ... [2018-04-12 10:53:21,482 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_strcpy_false-valid-deref_ground.i [2018-04-12 10:53:21,490 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-12 10:53:21,495 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-04-12 10:53:21,519 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-12 10:53:21,519 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-12 10:53:21,519 INFO L370 AbstractCegarLoop]: Hoare is false [2018-04-12 10:53:21,519 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-12 10:53:21,520 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-12 10:53:21,520 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-12 10:53:21,520 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-12 10:53:21,520 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-12 10:53:21,520 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-12 10:53:21,521 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-12 10:53:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-04-12 10:53:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-04-12 10:53:21,536 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:21,536 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:21,536 INFO L408 AbstractCegarLoop]: === Iteration 1 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:21,540 INFO L82 PathProgramCache]: Analyzing trace with hash -42208474, now seen corresponding path program 1 times [2018-04-12 10:53:21,541 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:21,542 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:21,570 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:21,570 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:21,594 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:21,628 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 10:53:21,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-04-12 10:53:21,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-04-12 10:53:21,636 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-04-12 10:53:21,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-04-12 10:53:21,638 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2018-04-12 10:53:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:21,689 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-04-12 10:53:21,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-12 10:53:21,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-04-12 10:53:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:21,699 INFO L225 Difference]: With dead ends: 49 [2018-04-12 10:53:21,699 INFO L226 Difference]: Without dead ends: 40 [2018-04-12 10:53:21,701 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-04-12 10:53:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-04-12 10:53:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2018-04-12 10:53:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-04-12 10:53:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-04-12 10:53:21,734 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 7 [2018-04-12 10:53:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:21,734 INFO L459 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-04-12 10:53:21,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-04-12 10:53:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-04-12 10:53:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-04-12 10:53:21,735 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:21,735 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:21,735 INFO L408 AbstractCegarLoop]: === Iteration 2 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash 619915766, now seen corresponding path program 1 times [2018-04-12 10:53:21,735 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:21,735 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:21,736 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:21,737 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:21,747 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:21,779 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 10:53:21,779 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-04-12 10:53:21,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-12 10:53:21,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-12 10:53:21,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-12 10:53:21,782 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2018-04-12 10:53:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:21,821 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-04-12 10:53:21,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-12 10:53:21,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-04-12 10:53:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:21,822 INFO L225 Difference]: With dead ends: 34 [2018-04-12 10:53:21,822 INFO L226 Difference]: Without dead ends: 31 [2018-04-12 10:53:21,823 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-12 10:53:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-04-12 10:53:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-04-12 10:53:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-04-12 10:53:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-04-12 10:53:21,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 12 [2018-04-12 10:53:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:21,825 INFO L459 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-04-12 10:53:21,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-12 10:53:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-04-12 10:53:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-04-12 10:53:21,826 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:21,826 INFO L355 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:21,826 INFO L408 AbstractCegarLoop]: === Iteration 3 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash 621575575, now seen corresponding path program 1 times [2018-04-12 10:53:21,826 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:21,826 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:21,827 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:21,827 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:21,833 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:21,861 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:21,861 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:21,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:21,880 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:21,923 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:21,924 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-04-12 10:53:21,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-12 10:53:21,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-12 10:53:21,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-04-12 10:53:21,924 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 4 states. [2018-04-12 10:53:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:21,972 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-04-12 10:53:21,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-12 10:53:21,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-04-12 10:53:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:21,973 INFO L225 Difference]: With dead ends: 45 [2018-04-12 10:53:21,973 INFO L226 Difference]: Without dead ends: 45 [2018-04-12 10:53:21,974 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-04-12 10:53:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-04-12 10:53:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-04-12 10:53:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-04-12 10:53:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-04-12 10:53:21,978 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 12 [2018-04-12 10:53:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:21,978 INFO L459 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-04-12 10:53:21,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-12 10:53:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-04-12 10:53:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-04-12 10:53:21,979 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:21,979 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:21,979 INFO L408 AbstractCegarLoop]: === Iteration 4 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1962704421, now seen corresponding path program 1 times [2018-04-12 10:53:21,979 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:21,980 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:21,980 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:21,981 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:21,987 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,020 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,021 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,038 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-12 10:53:22,060 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-12 10:53:22,060 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2018-04-12 10:53:22,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-12 10:53:22,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-12 10:53:22,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-12 10:53:22,061 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2018-04-12 10:53:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:22,103 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-04-12 10:53:22,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-12 10:53:22,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-04-12 10:53:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:22,104 INFO L225 Difference]: With dead ends: 57 [2018-04-12 10:53:22,105 INFO L226 Difference]: Without dead ends: 57 [2018-04-12 10:53:22,105 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-12 10:53:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-04-12 10:53:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2018-04-12 10:53:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-04-12 10:53:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-04-12 10:53:22,110 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 17 [2018-04-12 10:53:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:22,110 INFO L459 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-04-12 10:53:22,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-12 10:53:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-04-12 10:53:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-04-12 10:53:22,111 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:22,111 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:22,111 INFO L408 AbstractCegarLoop]: === Iteration 5 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1964364230, now seen corresponding path program 2 times [2018-04-12 10:53:22,111 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:22,111 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:22,112 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:22,112 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,119 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,154 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,154 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:22,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:22,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:22,167 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,190 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:22,190 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-04-12 10:53:22,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-12 10:53:22,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-12 10:53:22,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-12 10:53:22,191 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 5 states. [2018-04-12 10:53:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:22,231 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-04-12 10:53:22,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-12 10:53:22,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-04-12 10:53:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:22,234 INFO L225 Difference]: With dead ends: 71 [2018-04-12 10:53:22,234 INFO L226 Difference]: Without dead ends: 71 [2018-04-12 10:53:22,234 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-12 10:53:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-04-12 10:53:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2018-04-12 10:53:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-04-12 10:53:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-04-12 10:53:22,238 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2018-04-12 10:53:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:22,238 INFO L459 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-04-12 10:53:22,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-12 10:53:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-04-12 10:53:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-04-12 10:53:22,239 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:22,239 INFO L355 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:22,239 INFO L408 AbstractCegarLoop]: === Iteration 6 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1777648375, now seen corresponding path program 3 times [2018-04-12 10:53:22,240 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:22,240 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:22,240 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:22,241 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,248 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,282 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,282 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:22,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-04-12 10:53:22,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:22,297 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,322 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:22,322 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-04-12 10:53:22,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-12 10:53:22,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-12 10:53:22,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-04-12 10:53:22,323 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2018-04-12 10:53:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:22,402 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-04-12 10:53:22,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-12 10:53:22,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-04-12 10:53:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:22,403 INFO L225 Difference]: With dead ends: 89 [2018-04-12 10:53:22,403 INFO L226 Difference]: Without dead ends: 89 [2018-04-12 10:53:22,404 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-04-12 10:53:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-04-12 10:53:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2018-04-12 10:53:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-04-12 10:53:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-04-12 10:53:22,406 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 22 [2018-04-12 10:53:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:22,406 INFO L459 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-04-12 10:53:22,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-12 10:53:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-04-12 10:53:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-04-12 10:53:22,407 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:22,407 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] [2018-04-12 10:53:22,407 INFO L408 AbstractCegarLoop]: === Iteration 7 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:22,407 INFO L82 PathProgramCache]: Analyzing trace with hash -788155134, now seen corresponding path program 1 times [2018-04-12 10:53:22,407 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:22,407 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:22,408 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:22,408 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,414 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,434 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,434 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,445 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,481 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:22,481 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-04-12 10:53:22,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-12 10:53:22,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-12 10:53:22,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-04-12 10:53:22,482 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 8 states. [2018-04-12 10:53:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:22,535 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-04-12 10:53:22,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-12 10:53:22,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-04-12 10:53:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:22,536 INFO L225 Difference]: With dead ends: 59 [2018-04-12 10:53:22,536 INFO L226 Difference]: Without dead ends: 50 [2018-04-12 10:53:22,537 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-04-12 10:53:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-04-12 10:53:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-04-12 10:53:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-04-12 10:53:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2018-04-12 10:53:22,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 27 [2018-04-12 10:53:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:22,541 INFO L459 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2018-04-12 10:53:22,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-12 10:53:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2018-04-12 10:53:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-04-12 10:53:22,541 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:22,541 INFO L355 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:22,541 INFO L408 AbstractCegarLoop]: === Iteration 8 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1667360870, now seen corresponding path program 4 times [2018-04-12 10:53:22,542 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:22,542 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:22,542 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:22,542 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,547 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,601 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,601 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:22,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:22,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:22,618 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,644 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:22,645 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-04-12 10:53:22,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-12 10:53:22,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-12 10:53:22,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-04-12 10:53:22,646 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 7 states. [2018-04-12 10:53:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:22,730 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2018-04-12 10:53:22,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-04-12 10:53:22,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-04-12 10:53:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:22,731 INFO L225 Difference]: With dead ends: 94 [2018-04-12 10:53:22,731 INFO L226 Difference]: Without dead ends: 94 [2018-04-12 10:53:22,731 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-04-12 10:53:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-04-12 10:53:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2018-04-12 10:53:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-04-12 10:53:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-04-12 10:53:22,734 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2018-04-12 10:53:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:22,734 INFO L459 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-04-12 10:53:22,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-12 10:53:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-04-12 10:53:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-12 10:53:22,735 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:22,735 INFO L355 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:22,735 INFO L408 AbstractCegarLoop]: === Iteration 9 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1804493581, now seen corresponding path program 2 times [2018-04-12 10:53:22,735 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:22,735 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:22,736 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:22,736 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,743 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-12 10:53:22,777 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,777 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:22,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:22,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:22,801 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-12 10:53:22,839 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:22,839 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-04-12 10:53:22,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-12 10:53:22,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-12 10:53:22,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-12 10:53:22,840 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 6 states. [2018-04-12 10:53:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:22,879 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-04-12 10:53:22,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-12 10:53:22,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-04-12 10:53:22,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:22,881 INFO L225 Difference]: With dead ends: 55 [2018-04-12 10:53:22,881 INFO L226 Difference]: Without dead ends: 38 [2018-04-12 10:53:22,881 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-04-12 10:53:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-04-12 10:53:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-04-12 10:53:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-04-12 10:53:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-04-12 10:53:22,884 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-04-12 10:53:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:22,884 INFO L459 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-04-12 10:53:22,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-12 10:53:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-04-12 10:53:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-12 10:53:22,885 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:22,885 INFO L355 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:22,885 INFO L408 AbstractCegarLoop]: === Iteration 10 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 651022423, now seen corresponding path program 5 times [2018-04-12 10:53:22,885 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:22,885 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:22,886 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:22,886 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:22,893 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:22,944 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:22,944 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:22,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:22,966 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-04-12 10:53:22,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:22,968 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,045 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:23,045 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-04-12 10:53:23,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-04-12 10:53:23,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-04-12 10:53:23,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-04-12 10:53:23,046 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-04-12 10:53:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:23,115 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-04-12 10:53:23,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-12 10:53:23,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-04-12 10:53:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:23,116 INFO L225 Difference]: With dead ends: 43 [2018-04-12 10:53:23,116 INFO L226 Difference]: Without dead ends: 43 [2018-04-12 10:53:23,116 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-04-12 10:53:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-04-12 10:53:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-04-12 10:53:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-04-12 10:53:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-04-12 10:53:23,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 32 [2018-04-12 10:53:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:23,118 INFO L459 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-04-12 10:53:23,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-04-12 10:53:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-04-12 10:53:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-04-12 10:53:23,119 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:23,119 INFO L355 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:23,119 INFO L408 AbstractCegarLoop]: === Iteration 11 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1728432378, now seen corresponding path program 6 times [2018-04-12 10:53:23,119 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:23,119 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:23,120 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:23,120 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:23,127 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,186 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:23,186 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:23,191 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:53:23,200 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-04-12 10:53:23,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:23,202 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,243 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:23,243 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-04-12 10:53:23,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-12 10:53:23,243 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-12 10:53:23,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-04-12 10:53:23,243 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 13 states. [2018-04-12 10:53:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:23,315 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-04-12 10:53:23,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-12 10:53:23,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-04-12 10:53:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:23,316 INFO L225 Difference]: With dead ends: 48 [2018-04-12 10:53:23,316 INFO L226 Difference]: Without dead ends: 48 [2018-04-12 10:53:23,316 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-04-12 10:53:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-04-12 10:53:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-04-12 10:53:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-04-12 10:53:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-04-12 10:53:23,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 37 [2018-04-12 10:53:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:23,319 INFO L459 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-04-12 10:53:23,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-12 10:53:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-04-12 10:53:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-04-12 10:53:23,320 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:23,320 INFO L355 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:23,320 INFO L408 AbstractCegarLoop]: === Iteration 12 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash -616716873, now seen corresponding path program 7 times [2018-04-12 10:53:23,320 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:23,320 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:23,321 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:23,321 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:23,328 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,373 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:23,373 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:23,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:23,387 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,442 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:23,442 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-04-12 10:53:23,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-12 10:53:23,443 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-12 10:53:23,443 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-04-12 10:53:23,443 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-04-12 10:53:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:23,511 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-04-12 10:53:23,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-12 10:53:23,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2018-04-12 10:53:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:23,512 INFO L225 Difference]: With dead ends: 53 [2018-04-12 10:53:23,512 INFO L226 Difference]: Without dead ends: 53 [2018-04-12 10:53:23,513 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-04-12 10:53:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-04-12 10:53:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-04-12 10:53:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-04-12 10:53:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-04-12 10:53:23,516 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 42 [2018-04-12 10:53:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:23,517 INFO L459 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-04-12 10:53:23,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-12 10:53:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-04-12 10:53:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-12 10:53:23,518 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:23,518 INFO L355 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:23,518 INFO L408 AbstractCegarLoop]: === Iteration 13 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1845018022, now seen corresponding path program 8 times [2018-04-12 10:53:23,518 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:23,518 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:23,518 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:23,519 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:23,525 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,601 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:23,602 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:23,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:23,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:23,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:23,618 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,652 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:23,652 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-04-12 10:53:23,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-12 10:53:23,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-12 10:53:23,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-04-12 10:53:23,653 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 11 states. [2018-04-12 10:53:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:23,762 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-04-12 10:53:23,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-04-12 10:53:23,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-04-12 10:53:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:23,763 INFO L225 Difference]: With dead ends: 58 [2018-04-12 10:53:23,763 INFO L226 Difference]: Without dead ends: 58 [2018-04-12 10:53:23,763 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-04-12 10:53:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-04-12 10:53:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-04-12 10:53:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-04-12 10:53:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-04-12 10:53:23,765 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 47 [2018-04-12 10:53:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:23,765 INFO L459 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-04-12 10:53:23,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-12 10:53:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-04-12 10:53:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-04-12 10:53:23,766 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:23,766 INFO L355 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:23,766 INFO L408 AbstractCegarLoop]: === Iteration 14 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:23,766 INFO L82 PathProgramCache]: Analyzing trace with hash 795493143, now seen corresponding path program 9 times [2018-04-12 10:53:23,766 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:23,766 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:23,767 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:23,767 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:23,773 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,851 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:23,851 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:23,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:23,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-04-12 10:53:23,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:23,880 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:23,908 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:23,908 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-04-12 10:53:23,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-12 10:53:23,908 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-12 10:53:23,908 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-04-12 10:53:23,908 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-04-12 10:53:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:24,004 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-04-12 10:53:24,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-12 10:53:24,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-04-12 10:53:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:24,005 INFO L225 Difference]: With dead ends: 63 [2018-04-12 10:53:24,005 INFO L226 Difference]: Without dead ends: 63 [2018-04-12 10:53:24,005 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2018-04-12 10:53:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-04-12 10:53:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-04-12 10:53:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-04-12 10:53:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-04-12 10:53:24,007 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 52 [2018-04-12 10:53:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:24,008 INFO L459 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-04-12 10:53:24,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-12 10:53:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-04-12 10:53:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-04-12 10:53:24,009 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:24,009 INFO L355 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:24,009 INFO L408 AbstractCegarLoop]: === Iteration 15 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1643609158, now seen corresponding path program 10 times [2018-04-12 10:53:24,009 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:24,009 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:24,010 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:24,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:24,010 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:24,017 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:24,097 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:24,097 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:24,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:24,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:24,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:24,125 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:24,226 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:24,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-04-12 10:53:24,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-12 10:53:24,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-12 10:53:24,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2018-04-12 10:53:24,227 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 25 states. [2018-04-12 10:53:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:24,391 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-04-12 10:53:24,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-04-12 10:53:24,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-04-12 10:53:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:24,391 INFO L225 Difference]: With dead ends: 68 [2018-04-12 10:53:24,392 INFO L226 Difference]: Without dead ends: 68 [2018-04-12 10:53:24,392 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2018-04-12 10:53:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-04-12 10:53:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-04-12 10:53:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-04-12 10:53:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-04-12 10:53:24,395 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 57 [2018-04-12 10:53:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:24,395 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-04-12 10:53:24,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-12 10:53:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-04-12 10:53:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-04-12 10:53:24,396 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:24,396 INFO L355 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:24,396 INFO L408 AbstractCegarLoop]: === Iteration 16 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1408870519, now seen corresponding path program 11 times [2018-04-12 10:53:24,396 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:24,396 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:24,397 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:24,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:24,397 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:24,405 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:24,486 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:24,486 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:24,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:24,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-04-12 10:53:24,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:24,511 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:24,625 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:24,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2018-04-12 10:53:24,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-04-12 10:53:24,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-04-12 10:53:24,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-04-12 10:53:24,626 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 26 states. [2018-04-12 10:53:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:24,840 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-04-12 10:53:24,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-12 10:53:24,840 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-04-12 10:53:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:24,841 INFO L225 Difference]: With dead ends: 73 [2018-04-12 10:53:24,841 INFO L226 Difference]: Without dead ends: 73 [2018-04-12 10:53:24,841 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-04-12 10:53:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-04-12 10:53:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-04-12 10:53:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-04-12 10:53:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-04-12 10:53:24,844 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 62 [2018-04-12 10:53:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:24,844 INFO L459 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-04-12 10:53:24,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-04-12 10:53:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-04-12 10:53:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-04-12 10:53:24,845 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:24,845 INFO L355 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:24,845 INFO L408 AbstractCegarLoop]: === Iteration 17 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1139772698, now seen corresponding path program 12 times [2018-04-12 10:53:24,846 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:24,846 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:24,846 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:24,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:24,853 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:24,863 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:24,973 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:24,973 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:24,978 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:53:24,995 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-04-12 10:53:24,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:24,996 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:25,108 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:25,108 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2018-04-12 10:53:25,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-04-12 10:53:25,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-04-12 10:53:25,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-04-12 10:53:25,109 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 20 states. [2018-04-12 10:53:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:25,367 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-04-12 10:53:25,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-04-12 10:53:25,367 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2018-04-12 10:53:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:25,368 INFO L225 Difference]: With dead ends: 78 [2018-04-12 10:53:25,368 INFO L226 Difference]: Without dead ends: 78 [2018-04-12 10:53:25,368 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2018-04-12 10:53:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-04-12 10:53:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-04-12 10:53:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-04-12 10:53:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-04-12 10:53:25,370 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 67 [2018-04-12 10:53:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:25,370 INFO L459 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-04-12 10:53:25,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-04-12 10:53:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-04-12 10:53:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-04-12 10:53:25,371 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:25,371 INFO L355 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:25,372 INFO L408 AbstractCegarLoop]: === Iteration 18 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1645336023, now seen corresponding path program 13 times [2018-04-12 10:53:25,372 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:25,372 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:25,373 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:25,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:25,373 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:25,379 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:25,477 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:25,477 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:25,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:25,493 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:25,589 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:25,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2018-04-12 10:53:25,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-12 10:53:25,590 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-12 10:53:25,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-04-12 10:53:25,591 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 31 states. [2018-04-12 10:53:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:25,826 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-04-12 10:53:25,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-04-12 10:53:25,826 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-04-12 10:53:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:25,827 INFO L225 Difference]: With dead ends: 83 [2018-04-12 10:53:25,827 INFO L226 Difference]: Without dead ends: 83 [2018-04-12 10:53:25,827 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-04-12 10:53:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-04-12 10:53:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-04-12 10:53:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-04-12 10:53:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-04-12 10:53:25,829 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 72 [2018-04-12 10:53:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:25,829 INFO L459 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-04-12 10:53:25,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-12 10:53:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-04-12 10:53:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-04-12 10:53:25,829 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:25,829 INFO L355 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:25,830 INFO L408 AbstractCegarLoop]: === Iteration 19 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash 719167878, now seen corresponding path program 14 times [2018-04-12 10:53:25,830 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:25,830 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:25,831 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:25,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:25,831 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:25,838 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:25,960 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:25,960 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:25,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:25,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:25,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:25,978 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:26,092 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:26,092 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2018-04-12 10:53:26,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-04-12 10:53:26,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-04-12 10:53:26,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2018-04-12 10:53:26,093 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 33 states. [2018-04-12 10:53:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:26,428 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-04-12 10:53:26,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-04-12 10:53:26,428 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 77 [2018-04-12 10:53:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:26,429 INFO L225 Difference]: With dead ends: 88 [2018-04-12 10:53:26,429 INFO L226 Difference]: Without dead ends: 88 [2018-04-12 10:53:26,429 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2018-04-12 10:53:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-04-12 10:53:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-04-12 10:53:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-04-12 10:53:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-04-12 10:53:26,430 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 77 [2018-04-12 10:53:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:26,431 INFO L459 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-04-12 10:53:26,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-04-12 10:53:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-04-12 10:53:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-04-12 10:53:26,431 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:26,431 INFO L355 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:26,431 INFO L408 AbstractCegarLoop]: === Iteration 20 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1151808713, now seen corresponding path program 15 times [2018-04-12 10:53:26,431 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:26,431 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:26,432 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:26,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:26,432 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:26,439 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:26,528 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:26,528 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:26,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:26,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-04-12 10:53:26,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:26,560 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:26,588 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:26,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-04-12 10:53:26,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-12 10:53:26,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-12 10:53:26,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-04-12 10:53:26,589 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-04-12 10:53:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:26,779 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-04-12 10:53:26,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-04-12 10:53:26,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-04-12 10:53:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:26,780 INFO L225 Difference]: With dead ends: 93 [2018-04-12 10:53:26,780 INFO L226 Difference]: Without dead ends: 93 [2018-04-12 10:53:26,780 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2018-04-12 10:53:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-04-12 10:53:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-04-12 10:53:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-04-12 10:53:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-04-12 10:53:26,782 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 82 [2018-04-12 10:53:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:26,782 INFO L459 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-04-12 10:53:26,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-12 10:53:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-04-12 10:53:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-04-12 10:53:26,782 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:26,782 INFO L355 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:26,782 INFO L408 AbstractCegarLoop]: === Iteration 21 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1685653542, now seen corresponding path program 16 times [2018-04-12 10:53:26,783 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:26,783 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:26,783 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:26,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:26,783 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:26,788 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:26,907 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:26,907 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:26,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:26,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:26,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:26,924 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:26,953 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:26,954 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-04-12 10:53:26,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-12 10:53:26,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-12 10:53:26,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-04-12 10:53:26,954 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 19 states. [2018-04-12 10:53:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:27,259 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-04-12 10:53:27,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-04-12 10:53:27,259 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-04-12 10:53:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:27,259 INFO L225 Difference]: With dead ends: 98 [2018-04-12 10:53:27,259 INFO L226 Difference]: Without dead ends: 98 [2018-04-12 10:53:27,260 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-04-12 10:53:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-04-12 10:53:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-04-12 10:53:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-04-12 10:53:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-04-12 10:53:27,262 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 87 [2018-04-12 10:53:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:27,262 INFO L459 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-04-12 10:53:27,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-12 10:53:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-04-12 10:53:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-04-12 10:53:27,263 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:27,263 INFO L355 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:27,263 INFO L408 AbstractCegarLoop]: === Iteration 22 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1777633431, now seen corresponding path program 17 times [2018-04-12 10:53:27,263 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:27,263 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:27,264 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:27,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:27,264 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:27,272 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:27,380 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:27,380 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:27,385 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:27,416 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-04-12 10:53:27,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:27,418 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:27,592 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:27,592 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2018-04-12 10:53:27,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-04-12 10:53:27,593 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-04-12 10:53:27,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-04-12 10:53:27,593 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 38 states. [2018-04-12 10:53:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:28,006 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-04-12 10:53:28,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-04-12 10:53:28,007 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-04-12 10:53:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:28,007 INFO L225 Difference]: With dead ends: 103 [2018-04-12 10:53:28,007 INFO L226 Difference]: Without dead ends: 103 [2018-04-12 10:53:28,008 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2018-04-12 10:53:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-04-12 10:53:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-04-12 10:53:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-04-12 10:53:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-04-12 10:53:28,009 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 92 [2018-04-12 10:53:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:28,009 INFO L459 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-04-12 10:53:28,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-04-12 10:53:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-04-12 10:53:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-04-12 10:53:28,010 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:28,010 INFO L355 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:28,010 INFO L408 AbstractCegarLoop]: === Iteration 23 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -964909370, now seen corresponding path program 18 times [2018-04-12 10:53:28,010 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:28,010 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:28,011 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:28,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:28,011 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:28,015 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:28,137 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:28,137 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:28,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:53:28,167 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-04-12 10:53:28,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:28,168 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:28,234 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:28,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2018-04-12 10:53:28,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-12 10:53:28,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-12 10:53:28,234 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2018-04-12 10:53:28,235 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 25 states. [2018-04-12 10:53:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:28,459 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-04-12 10:53:28,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-12 10:53:28,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-04-12 10:53:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:28,460 INFO L225 Difference]: With dead ends: 108 [2018-04-12 10:53:28,460 INFO L226 Difference]: Without dead ends: 108 [2018-04-12 10:53:28,461 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=1186, Unknown=0, NotChecked=0, Total=1806 [2018-04-12 10:53:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-04-12 10:53:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-04-12 10:53:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-04-12 10:53:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-04-12 10:53:28,462 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 97 [2018-04-12 10:53:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:28,462 INFO L459 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-04-12 10:53:28,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-12 10:53:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-04-12 10:53:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-04-12 10:53:28,462 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:28,463 INFO L355 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:28,463 INFO L408 AbstractCegarLoop]: === Iteration 24 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2138370569, now seen corresponding path program 19 times [2018-04-12 10:53:28,463 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:28,463 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:28,463 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:28,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:28,463 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:28,469 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:28,585 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:28,585 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:28,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:28,602 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:28,787 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:28,788 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2018-04-12 10:53:28,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-12 10:53:28,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-12 10:53:28,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-04-12 10:53:28,789 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 43 states. [2018-04-12 10:53:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:29,239 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-04-12 10:53:29,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-04-12 10:53:29,239 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2018-04-12 10:53:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:29,239 INFO L225 Difference]: With dead ends: 113 [2018-04-12 10:53:29,239 INFO L226 Difference]: Without dead ends: 113 [2018-04-12 10:53:29,240 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-04-12 10:53:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-04-12 10:53:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-04-12 10:53:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-04-12 10:53:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-04-12 10:53:29,241 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 102 [2018-04-12 10:53:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:29,241 INFO L459 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-04-12 10:53:29,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-12 10:53:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-04-12 10:53:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-04-12 10:53:29,242 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:29,242 INFO L355 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:29,242 INFO L408 AbstractCegarLoop]: === Iteration 25 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash -167608986, now seen corresponding path program 20 times [2018-04-12 10:53:29,242 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:29,242 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:29,243 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:29,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:29,243 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:29,247 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:29,375 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:29,375 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:29,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:29,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:29,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:29,398 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:29,611 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:29,611 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2018-04-12 10:53:29,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-04-12 10:53:29,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-04-12 10:53:29,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-04-12 10:53:29,612 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 45 states. [2018-04-12 10:53:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:30,094 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-04-12 10:53:30,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-04-12 10:53:30,095 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2018-04-12 10:53:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:30,095 INFO L225 Difference]: With dead ends: 118 [2018-04-12 10:53:30,095 INFO L226 Difference]: Without dead ends: 118 [2018-04-12 10:53:30,096 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-04-12 10:53:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-04-12 10:53:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-04-12 10:53:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-04-12 10:53:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-04-12 10:53:30,097 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 107 [2018-04-12 10:53:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:30,097 INFO L459 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-04-12 10:53:30,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-04-12 10:53:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-04-12 10:53:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-04-12 10:53:30,098 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:30,098 INFO L355 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:30,098 INFO L408 AbstractCegarLoop]: === Iteration 26 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2051169111, now seen corresponding path program 21 times [2018-04-12 10:53:30,098 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:30,098 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:30,099 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:30,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:30,099 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:30,106 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:30,254 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:30,254 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:30,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:30,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-04-12 10:53:30,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:30,298 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:30,327 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:30,328 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-04-12 10:53:30,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-12 10:53:30,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-12 10:53:30,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-04-12 10:53:30,328 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-04-12 10:53:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:30,594 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-04-12 10:53:30,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-04-12 10:53:30,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2018-04-12 10:53:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:30,595 INFO L225 Difference]: With dead ends: 123 [2018-04-12 10:53:30,595 INFO L226 Difference]: Without dead ends: 123 [2018-04-12 10:53:30,595 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=762, Invalid=1308, Unknown=0, NotChecked=0, Total=2070 [2018-04-12 10:53:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-04-12 10:53:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-04-12 10:53:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-04-12 10:53:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-04-12 10:53:30,597 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 112 [2018-04-12 10:53:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:30,597 INFO L459 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-04-12 10:53:30,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-12 10:53:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-04-12 10:53:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-04-12 10:53:30,598 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:30,598 INFO L355 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:30,598 INFO L408 AbstractCegarLoop]: === Iteration 27 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2141490182, now seen corresponding path program 22 times [2018-04-12 10:53:30,598 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:30,598 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:30,598 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:30,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:30,599 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:30,604 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:30,820 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:30,821 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:30,828 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:30,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:30,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:30,853 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:31,145 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:31,145 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2018-04-12 10:53:31,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-12 10:53:31,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-12 10:53:31,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2018-04-12 10:53:31,146 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 49 states. [2018-04-12 10:53:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:31,613 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-04-12 10:53:31,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-04-12 10:53:31,613 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2018-04-12 10:53:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:31,614 INFO L225 Difference]: With dead ends: 128 [2018-04-12 10:53:31,614 INFO L226 Difference]: Without dead ends: 128 [2018-04-12 10:53:31,615 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2018-04-12 10:53:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-04-12 10:53:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-04-12 10:53:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-04-12 10:53:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-04-12 10:53:31,617 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 117 [2018-04-12 10:53:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:31,617 INFO L459 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-04-12 10:53:31,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-12 10:53:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-04-12 10:53:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-04-12 10:53:31,618 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:31,618 INFO L355 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:31,618 INFO L408 AbstractCegarLoop]: === Iteration 28 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1698664265, now seen corresponding path program 23 times [2018-04-12 10:53:31,619 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:31,619 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:31,619 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:31,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:31,620 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:31,628 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:31,800 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:31,800 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:31,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:31,865 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-04-12 10:53:31,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:31,867 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:32,103 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:32,104 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2018-04-12 10:53:32,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-04-12 10:53:32,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-04-12 10:53:32,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-04-12 10:53:32,105 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 50 states. [2018-04-12 10:53:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:32,632 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-04-12 10:53:32,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-04-12 10:53:32,633 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-04-12 10:53:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:32,633 INFO L225 Difference]: With dead ends: 133 [2018-04-12 10:53:32,633 INFO L226 Difference]: Without dead ends: 133 [2018-04-12 10:53:32,634 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2018-04-12 10:53:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-04-12 10:53:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-04-12 10:53:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-04-12 10:53:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-04-12 10:53:32,636 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 122 [2018-04-12 10:53:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:32,636 INFO L459 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-04-12 10:53:32,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-04-12 10:53:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-04-12 10:53:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-04-12 10:53:32,637 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:32,637 INFO L355 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:32,637 INFO L408 AbstractCegarLoop]: === Iteration 29 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2004669094, now seen corresponding path program 24 times [2018-04-12 10:53:32,637 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:32,637 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:32,638 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:32,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:32,638 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:32,645 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:32,801 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:32,802 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:32,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:53:32,846 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-04-12 10:53:32,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:32,847 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:32,979 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:32,979 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 36 [2018-04-12 10:53:32,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-12 10:53:32,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-12 10:53:32,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=932, Unknown=0, NotChecked=0, Total=1332 [2018-04-12 10:53:32,980 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 37 states. [2018-04-12 10:53:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:33,455 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-04-12 10:53:33,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-04-12 10:53:33,455 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 127 [2018-04-12 10:53:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:33,455 INFO L225 Difference]: With dead ends: 138 [2018-04-12 10:53:33,456 INFO L226 Difference]: Without dead ends: 138 [2018-04-12 10:53:33,457 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1067, Invalid=2593, Unknown=0, NotChecked=0, Total=3660 [2018-04-12 10:53:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-04-12 10:53:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-04-12 10:53:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-04-12 10:53:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-04-12 10:53:33,459 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 127 [2018-04-12 10:53:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:33,459 INFO L459 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-04-12 10:53:33,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-12 10:53:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-04-12 10:53:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-04-12 10:53:33,460 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:33,460 INFO L355 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:33,460 INFO L408 AbstractCegarLoop]: === Iteration 30 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1311460887, now seen corresponding path program 25 times [2018-04-12 10:53:33,460 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:33,461 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:33,461 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:33,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:33,461 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:33,467 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:33,654 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:33,654 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:33,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:33,674 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:33,894 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:33,894 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 54 [2018-04-12 10:53:33,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-12 10:53:33,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-12 10:53:33,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-04-12 10:53:33,895 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 55 states. [2018-04-12 10:53:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:34,668 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-04-12 10:53:34,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-04-12 10:53:34,668 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 132 [2018-04-12 10:53:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:34,669 INFO L225 Difference]: With dead ends: 143 [2018-04-12 10:53:34,669 INFO L226 Difference]: Without dead ends: 143 [2018-04-12 10:53:34,669 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-04-12 10:53:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-04-12 10:53:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-04-12 10:53:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-04-12 10:53:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-04-12 10:53:34,671 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 132 [2018-04-12 10:53:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:34,671 INFO L459 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-04-12 10:53:34,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-12 10:53:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-04-12 10:53:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-04-12 10:53:34,671 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:34,672 INFO L355 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:34,672 INFO L408 AbstractCegarLoop]: === Iteration 31 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:34,672 INFO L82 PathProgramCache]: Analyzing trace with hash 421876038, now seen corresponding path program 26 times [2018-04-12 10:53:34,672 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:34,672 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:34,672 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:34,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:34,672 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:34,679 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:34,913 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:34,913 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:34,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:34,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:34,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:34,935 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:35,169 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:35,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 56 [2018-04-12 10:53:35,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-04-12 10:53:35,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-04-12 10:53:35,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2018-04-12 10:53:35,171 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 57 states. [2018-04-12 10:53:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:35,902 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-04-12 10:53:35,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-04-12 10:53:35,902 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 137 [2018-04-12 10:53:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:35,903 INFO L225 Difference]: With dead ends: 148 [2018-04-12 10:53:35,903 INFO L226 Difference]: Without dead ends: 148 [2018-04-12 10:53:35,903 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2018-04-12 10:53:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-04-12 10:53:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-04-12 10:53:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-04-12 10:53:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-04-12 10:53:35,905 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 137 [2018-04-12 10:53:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:35,905 INFO L459 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-04-12 10:53:35,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-04-12 10:53:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-04-12 10:53:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-04-12 10:53:35,906 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:35,906 INFO L355 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:35,906 INFO L408 AbstractCegarLoop]: === Iteration 32 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1993804937, now seen corresponding path program 27 times [2018-04-12 10:53:35,906 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:35,906 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:35,907 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:35,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:35,907 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:35,913 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:36,146 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:36,146 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:36,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:36,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-04-12 10:53:36,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:36,218 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:36,250 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:36,250 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-04-12 10:53:36,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-12 10:53:36,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-12 10:53:36,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-04-12 10:53:36,251 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-04-12 10:53:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:36,605 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-04-12 10:53:36,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-04-12 10:53:36,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 142 [2018-04-12 10:53:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:36,606 INFO L225 Difference]: With dead ends: 153 [2018-04-12 10:53:36,606 INFO L226 Difference]: Without dead ends: 153 [2018-04-12 10:53:36,607 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1221, Invalid=2085, Unknown=0, NotChecked=0, Total=3306 [2018-04-12 10:53:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-04-12 10:53:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-04-12 10:53:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-04-12 10:53:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-04-12 10:53:36,609 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 142 [2018-04-12 10:53:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:36,609 INFO L459 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-04-12 10:53:36,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-12 10:53:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-04-12 10:53:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-04-12 10:53:36,610 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:36,610 INFO L355 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:36,610 INFO L408 AbstractCegarLoop]: === Iteration 33 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:36,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1740113894, now seen corresponding path program 28 times [2018-04-12 10:53:36,610 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:36,610 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:36,610 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:36,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:36,611 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:36,616 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:36,882 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:36,883 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:36,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:36,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:36,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:36,910 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:37,200 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:37,200 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 60 [2018-04-12 10:53:37,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-12 10:53:37,201 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-12 10:53:37,202 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=2790, Unknown=0, NotChecked=0, Total=3660 [2018-04-12 10:53:37,202 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 61 states. [2018-04-12 10:53:38,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:38,304 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-04-12 10:53:38,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-04-12 10:53:38,304 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 147 [2018-04-12 10:53:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:38,305 INFO L225 Difference]: With dead ends: 158 [2018-04-12 10:53:38,305 INFO L226 Difference]: Without dead ends: 158 [2018-04-12 10:53:38,305 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=870, Invalid=2790, Unknown=0, NotChecked=0, Total=3660 [2018-04-12 10:53:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-04-12 10:53:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-04-12 10:53:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-04-12 10:53:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-04-12 10:53:38,307 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 147 [2018-04-12 10:53:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:38,307 INFO L459 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-04-12 10:53:38,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-12 10:53:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-04-12 10:53:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-04-12 10:53:38,308 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:38,308 INFO L355 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:38,308 INFO L408 AbstractCegarLoop]: === Iteration 34 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash 685727959, now seen corresponding path program 29 times [2018-04-12 10:53:38,308 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:38,308 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:38,309 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:38,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:38,309 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:38,314 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:38,578 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:38,579 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:38,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:38,700 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-04-12 10:53:38,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:38,703 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:39,058 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:39,058 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2018-04-12 10:53:39,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-04-12 10:53:39,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-04-12 10:53:39,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-04-12 10:53:39,059 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 62 states. [2018-04-12 10:53:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:39,876 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-04-12 10:53:39,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-04-12 10:53:39,877 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-04-12 10:53:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:39,877 INFO L225 Difference]: With dead ends: 163 [2018-04-12 10:53:39,877 INFO L226 Difference]: Without dead ends: 163 [2018-04-12 10:53:39,878 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2018-04-12 10:53:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-04-12 10:53:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-04-12 10:53:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-04-12 10:53:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-04-12 10:53:39,880 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 152 [2018-04-12 10:53:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:39,880 INFO L459 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-04-12 10:53:39,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-04-12 10:53:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-04-12 10:53:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-04-12 10:53:39,880 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:39,881 INFO L355 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:39,881 INFO L408 AbstractCegarLoop]: === Iteration 35 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash -842074490, now seen corresponding path program 30 times [2018-04-12 10:53:39,881 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:39,881 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:39,882 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:39,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:39,882 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:39,890 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:40,208 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:40,209 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:40,213 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:53:40,283 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-04-12 10:53:40,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:40,285 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:40,356 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:40,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 36 [2018-04-12 10:53:40,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-12 10:53:40,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-12 10:53:40,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2018-04-12 10:53:40,357 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 37 states. [2018-04-12 10:53:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:40,812 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-04-12 10:53:40,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-04-12 10:53:40,812 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 157 [2018-04-12 10:53:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:40,813 INFO L225 Difference]: With dead ends: 168 [2018-04-12 10:53:40,813 INFO L226 Difference]: Without dead ends: 168 [2018-04-12 10:53:40,813 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1562, Invalid=2860, Unknown=0, NotChecked=0, Total=4422 [2018-04-12 10:53:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-04-12 10:53:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-04-12 10:53:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-04-12 10:53:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-04-12 10:53:40,816 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 157 [2018-04-12 10:53:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:40,816 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-04-12 10:53:40,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-12 10:53:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-04-12 10:53:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-04-12 10:53:40,817 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:40,817 INFO L355 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:40,817 INFO L408 AbstractCegarLoop]: === Iteration 36 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1391760951, now seen corresponding path program 31 times [2018-04-12 10:53:40,817 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:40,818 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:40,818 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:40,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:40,818 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:40,828 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:41,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:41,100 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:41,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:41,123 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:41,435 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:41,435 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 66 [2018-04-12 10:53:41,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-12 10:53:41,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-12 10:53:41,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-04-12 10:53:41,437 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 67 states. [2018-04-12 10:53:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:42,599 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-04-12 10:53:42,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-04-12 10:53:42,600 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 162 [2018-04-12 10:53:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:42,600 INFO L225 Difference]: With dead ends: 173 [2018-04-12 10:53:42,601 INFO L226 Difference]: Without dead ends: 173 [2018-04-12 10:53:42,601 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-04-12 10:53:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-04-12 10:53:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-04-12 10:53:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-04-12 10:53:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-04-12 10:53:42,603 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 162 [2018-04-12 10:53:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:42,604 INFO L459 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-04-12 10:53:42,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-12 10:53:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-04-12 10:53:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-04-12 10:53:42,604 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:42,604 INFO L355 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:42,605 INFO L408 AbstractCegarLoop]: === Iteration 37 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1115415258, now seen corresponding path program 32 times [2018-04-12 10:53:42,605 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:42,605 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:42,605 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:42,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:42,606 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:42,612 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:43,013 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:43,013 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:43,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:43,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:43,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:43,041 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:43,095 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:43,096 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-04-12 10:53:43,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-04-12 10:53:43,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-04-12 10:53:43,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-04-12 10:53:43,096 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 35 states. [2018-04-12 10:53:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:44,182 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-04-12 10:53:44,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-04-12 10:53:44,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-04-12 10:53:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:44,183 INFO L225 Difference]: With dead ends: 178 [2018-04-12 10:53:44,183 INFO L226 Difference]: Without dead ends: 178 [2018-04-12 10:53:44,184 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-04-12 10:53:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-04-12 10:53:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-04-12 10:53:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-04-12 10:53:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-04-12 10:53:44,186 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 167 [2018-04-12 10:53:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:44,187 INFO L459 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-04-12 10:53:44,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-04-12 10:53:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-04-12 10:53:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-04-12 10:53:44,188 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:44,188 INFO L355 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:44,188 INFO L408 AbstractCegarLoop]: === Iteration 38 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash -712076393, now seen corresponding path program 33 times [2018-04-12 10:53:44,188 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:44,188 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:44,189 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:44,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:44,189 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:44,199 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:44,629 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:44,629 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:44,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:44,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-04-12 10:53:44,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:44,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:44,844 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:44,844 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-04-12 10:53:44,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-12 10:53:44,845 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-12 10:53:44,845 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-04-12 10:53:44,845 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-04-12 10:53:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:45,333 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-04-12 10:53:45,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-04-12 10:53:45,333 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 172 [2018-04-12 10:53:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:45,334 INFO L225 Difference]: With dead ends: 183 [2018-04-12 10:53:45,334 INFO L226 Difference]: Without dead ends: 183 [2018-04-12 10:53:45,335 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1788, Invalid=3042, Unknown=0, NotChecked=0, Total=4830 [2018-04-12 10:53:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-04-12 10:53:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-04-12 10:53:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-04-12 10:53:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-04-12 10:53:45,337 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 172 [2018-04-12 10:53:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:45,338 INFO L459 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-04-12 10:53:45,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-12 10:53:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-04-12 10:53:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-04-12 10:53:45,339 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:45,339 INFO L355 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:45,339 INFO L408 AbstractCegarLoop]: === Iteration 39 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1349614534, now seen corresponding path program 34 times [2018-04-12 10:53:45,339 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:45,339 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:45,340 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:45,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:45,340 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:45,349 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:45,696 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:45,696 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:45,701 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:45,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:45,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:45,723 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:46,173 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:46,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 72 [2018-04-12 10:53:46,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-12 10:53:46,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-12 10:53:46,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=3924, Unknown=0, NotChecked=0, Total=5256 [2018-04-12 10:53:46,174 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 73 states. [2018-04-12 10:53:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:47,366 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-04-12 10:53:47,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-04-12 10:53:47,366 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 177 [2018-04-12 10:53:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:47,367 INFO L225 Difference]: With dead ends: 188 [2018-04-12 10:53:47,367 INFO L226 Difference]: Without dead ends: 188 [2018-04-12 10:53:47,368 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1332, Invalid=3924, Unknown=0, NotChecked=0, Total=5256 [2018-04-12 10:53:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-04-12 10:53:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-04-12 10:53:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-04-12 10:53:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-04-12 10:53:47,370 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 177 [2018-04-12 10:53:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:47,370 INFO L459 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-04-12 10:53:47,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-12 10:53:47,370 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-04-12 10:53:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-04-12 10:53:47,370 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:47,371 INFO L355 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:47,371 INFO L408 AbstractCegarLoop]: === Iteration 40 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2024580873, now seen corresponding path program 35 times [2018-04-12 10:53:47,371 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:47,371 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:47,371 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:47,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:47,371 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:47,377 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:47,721 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:47,721 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:47,726 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:47,943 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-04-12 10:53:47,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:47,946 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:48,431 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:48,431 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2018-04-12 10:53:48,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-04-12 10:53:48,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-04-12 10:53:48,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-04-12 10:53:48,432 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 74 states. [2018-04-12 10:53:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:49,570 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-04-12 10:53:49,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-04-12 10:53:49,570 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-04-12 10:53:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:49,571 INFO L225 Difference]: With dead ends: 193 [2018-04-12 10:53:49,571 INFO L226 Difference]: Without dead ends: 193 [2018-04-12 10:53:49,572 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1443, Invalid=4107, Unknown=0, NotChecked=0, Total=5550 [2018-04-12 10:53:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-04-12 10:53:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-04-12 10:53:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-04-12 10:53:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-04-12 10:53:49,573 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 182 [2018-04-12 10:53:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:49,573 INFO L459 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-04-12 10:53:49,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-04-12 10:53:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-04-12 10:53:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-04-12 10:53:49,574 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:49,574 INFO L355 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:49,574 INFO L408 AbstractCegarLoop]: === Iteration 41 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash -407825818, now seen corresponding path program 36 times [2018-04-12 10:53:49,574 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:49,574 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:49,575 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:49,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:49,575 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:49,581 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:50,044 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:50,044 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:50,049 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:53:50,215 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-04-12 10:53:50,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:50,219 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:50,375 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:50,375 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 44 [2018-04-12 10:53:50,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-04-12 10:53:50,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-04-12 10:53:50,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1244, Unknown=0, NotChecked=0, Total=1980 [2018-04-12 10:53:50,376 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 45 states. [2018-04-12 10:53:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:51,086 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-04-12 10:53:51,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-04-12 10:53:51,086 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 187 [2018-04-12 10:53:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:51,086 INFO L225 Difference]: With dead ends: 198 [2018-04-12 10:53:51,086 INFO L226 Difference]: Without dead ends: 198 [2018-04-12 10:53:51,087 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2205, Invalid=4275, Unknown=0, NotChecked=0, Total=6480 [2018-04-12 10:53:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-04-12 10:53:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-04-12 10:53:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-04-12 10:53:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-04-12 10:53:51,088 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 187 [2018-04-12 10:53:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:51,089 INFO L459 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-04-12 10:53:51,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-04-12 10:53:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-04-12 10:53:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-04-12 10:53:51,089 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:51,089 INFO L355 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:51,089 INFO L408 AbstractCegarLoop]: === Iteration 42 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1486297513, now seen corresponding path program 37 times [2018-04-12 10:53:51,089 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:51,089 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:51,090 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:51,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:51,090 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:51,098 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:51,602 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:51,602 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:51,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:51,646 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:52,078 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:52,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 78 [2018-04-12 10:53:52,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-04-12 10:53:52,079 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-04-12 10:53:52,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-04-12 10:53:52,079 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 79 states. [2018-04-12 10:53:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:53,332 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-04-12 10:53:53,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-04-12 10:53:53,332 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 192 [2018-04-12 10:53:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:53,333 INFO L225 Difference]: With dead ends: 203 [2018-04-12 10:53:53,333 INFO L226 Difference]: Without dead ends: 203 [2018-04-12 10:53:53,333 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-04-12 10:53:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-04-12 10:53:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-04-12 10:53:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-04-12 10:53:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-04-12 10:53:53,336 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 192 [2018-04-12 10:53:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:53,336 INFO L459 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-04-12 10:53:53,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-04-12 10:53:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-04-12 10:53:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-04-12 10:53:53,337 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:53,337 INFO L355 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:53,337 INFO L408 AbstractCegarLoop]: === Iteration 43 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:53,337 INFO L82 PathProgramCache]: Analyzing trace with hash -874716922, now seen corresponding path program 38 times [2018-04-12 10:53:53,338 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:53,338 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:53,338 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:53,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:53:53,338 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:53,352 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:53,761 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:53,761 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:53,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:53:53,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:53:53,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:53,789 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:54,225 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:54,225 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 80 [2018-04-12 10:53:54,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-04-12 10:53:54,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-04-12 10:53:54,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2018-04-12 10:53:54,227 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 81 states. [2018-04-12 10:53:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:55,761 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-04-12 10:53:55,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-04-12 10:53:55,761 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 197 [2018-04-12 10:53:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:55,762 INFO L225 Difference]: With dead ends: 208 [2018-04-12 10:53:55,762 INFO L226 Difference]: Without dead ends: 208 [2018-04-12 10:53:55,762 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2018-04-12 10:53:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-04-12 10:53:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-04-12 10:53:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-04-12 10:53:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-04-12 10:53:55,764 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 197 [2018-04-12 10:53:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:55,764 INFO L459 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-04-12 10:53:55,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-04-12 10:53:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-04-12 10:53:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-04-12 10:53:55,765 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:55,765 INFO L355 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:55,765 INFO L408 AbstractCegarLoop]: === Iteration 44 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1031093175, now seen corresponding path program 39 times [2018-04-12 10:53:55,765 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:55,765 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:55,766 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:55,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:55,766 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:55,772 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:56,131 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:56,131 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:56,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:53:56,334 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-04-12 10:53:56,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:56,338 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:56,398 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:56,398 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-04-12 10:53:56,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-12 10:53:56,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-12 10:53:56,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-04-12 10:53:56,399 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 43 states. [2018-04-12 10:53:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:56,996 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-04-12 10:53:56,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-04-12 10:53:56,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 202 [2018-04-12 10:53:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:56,997 INFO L225 Difference]: With dead ends: 213 [2018-04-12 10:53:56,997 INFO L226 Difference]: Without dead ends: 213 [2018-04-12 10:53:56,998 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2463, Invalid=4179, Unknown=0, NotChecked=0, Total=6642 [2018-04-12 10:53:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-04-12 10:53:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-04-12 10:53:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-04-12 10:53:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-04-12 10:53:56,999 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 202 [2018-04-12 10:53:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:56,999 INFO L459 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-04-12 10:53:56,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-12 10:53:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-04-12 10:53:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-04-12 10:53:57,000 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:57,000 INFO L355 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:57,000 INFO L408 AbstractCegarLoop]: === Iteration 45 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:57,000 INFO L82 PathProgramCache]: Analyzing trace with hash -854661210, now seen corresponding path program 40 times [2018-04-12 10:53:57,000 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:57,000 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:57,001 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:57,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:57,001 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:57,006 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:57,372 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:57,372 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:57,377 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:53:57,398 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:53:57,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:57,400 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:53:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:58,018 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:53:58,018 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 84 [2018-04-12 10:53:58,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-12 10:53:58,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-12 10:53:58,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=5586, Unknown=0, NotChecked=0, Total=7140 [2018-04-12 10:53:58,019 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 85 states. [2018-04-12 10:53:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:53:59,183 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-04-12 10:53:59,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-04-12 10:53:59,183 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 207 [2018-04-12 10:53:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:53:59,184 INFO L225 Difference]: With dead ends: 218 [2018-04-12 10:53:59,184 INFO L226 Difference]: Without dead ends: 218 [2018-04-12 10:53:59,184 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1554, Invalid=5586, Unknown=0, NotChecked=0, Total=7140 [2018-04-12 10:53:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-04-12 10:53:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-04-12 10:53:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-04-12 10:53:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-04-12 10:53:59,186 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 207 [2018-04-12 10:53:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:53:59,186 INFO L459 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-04-12 10:53:59,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-12 10:53:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-04-12 10:53:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-04-12 10:53:59,187 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:53:59,187 INFO L355 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-04-12 10:53:59,187 INFO L408 AbstractCegarLoop]: === Iteration 46 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:53:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2040420631, now seen corresponding path program 41 times [2018-04-12 10:53:59,187 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:53:59,187 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:53:59,188 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:59,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:53:59,188 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:53:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:53:59,194 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:53:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:53:59,605 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:53:59,605 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:53:59,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:53:59,963 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-04-12 10:53:59,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:53:59,966 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:00,552 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:00,568 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2018-04-12 10:54:00,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-04-12 10:54:00,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-04-12 10:54:00,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-04-12 10:54:00,570 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 86 states. [2018-04-12 10:54:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:03,010 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-04-12 10:54:03,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-04-12 10:54:03,010 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-04-12 10:54:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:03,011 INFO L225 Difference]: With dead ends: 223 [2018-04-12 10:54:03,011 INFO L226 Difference]: Without dead ends: 223 [2018-04-12 10:54:03,011 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1935, Invalid=5547, Unknown=0, NotChecked=0, Total=7482 [2018-04-12 10:54:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-04-12 10:54:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-04-12 10:54:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-04-12 10:54:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-04-12 10:54:03,013 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 212 [2018-04-12 10:54:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:03,013 INFO L459 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-04-12 10:54:03,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-04-12 10:54:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-04-12 10:54:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-04-12 10:54:03,014 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:03,014 INFO L355 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:03,014 INFO L408 AbstractCegarLoop]: === Iteration 47 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash -488561082, now seen corresponding path program 42 times [2018-04-12 10:54:03,014 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:03,014 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:03,015 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:03,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:03,015 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:03,020 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:03,432 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:03,432 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:03,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:54:03,576 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-04-12 10:54:03,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:03,579 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:03,665 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:03,665 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 48 [2018-04-12 10:54:03,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-12 10:54:03,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-12 10:54:03,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=1388, Unknown=0, NotChecked=0, Total=2352 [2018-04-12 10:54:03,666 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 49 states. [2018-04-12 10:54:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:04,427 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-04-12 10:54:04,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-12 10:54:04,427 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 217 [2018-04-12 10:54:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:04,428 INFO L225 Difference]: With dead ends: 228 [2018-04-12 10:54:04,428 INFO L226 Difference]: Without dead ends: 228 [2018-04-12 10:54:04,428 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2936, Invalid=5254, Unknown=0, NotChecked=0, Total=8190 [2018-04-12 10:54:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-04-12 10:54:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-04-12 10:54:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-04-12 10:54:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-04-12 10:54:04,431 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 217 [2018-04-12 10:54:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:04,432 INFO L459 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-04-12 10:54:04,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-12 10:54:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-04-12 10:54:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-04-12 10:54:04,433 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:04,433 INFO L355 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:04,433 INFO L408 AbstractCegarLoop]: === Iteration 48 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash 344604279, now seen corresponding path program 43 times [2018-04-12 10:54:04,433 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:04,433 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:04,434 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:04,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:04,434 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:04,439 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:04,877 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:04,877 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:04,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:54:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:04,905 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:05,426 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:05,426 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 90 [2018-04-12 10:54:05,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-04-12 10:54:05,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-04-12 10:54:05,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-04-12 10:54:05,427 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 91 states. [2018-04-12 10:54:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:07,515 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-04-12 10:54:07,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-04-12 10:54:07,515 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 222 [2018-04-12 10:54:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:07,516 INFO L225 Difference]: With dead ends: 233 [2018-04-12 10:54:07,516 INFO L226 Difference]: Without dead ends: 233 [2018-04-12 10:54:07,516 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-04-12 10:54:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-04-12 10:54:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-04-12 10:54:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-04-12 10:54:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-04-12 10:54:07,518 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 222 [2018-04-12 10:54:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:07,518 INFO L459 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-04-12 10:54:07,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-04-12 10:54:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-04-12 10:54:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-04-12 10:54:07,519 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:07,519 INFO L355 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:07,519 INFO L408 AbstractCegarLoop]: === Iteration 49 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash -865231642, now seen corresponding path program 44 times [2018-04-12 10:54:07,519 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:07,519 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:07,520 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:07,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:54:07,520 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:07,526 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:07,960 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:07,960 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:07,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:54:07,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:54:07,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:07,989 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:08,591 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:08,591 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 92 [2018-04-12 10:54:08,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-04-12 10:54:08,592 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-04-12 10:54:08,592 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2070, Invalid=6486, Unknown=0, NotChecked=0, Total=8556 [2018-04-12 10:54:08,593 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 93 states. [2018-04-12 10:54:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:10,230 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-04-12 10:54:10,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-04-12 10:54:10,230 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 227 [2018-04-12 10:54:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:10,231 INFO L225 Difference]: With dead ends: 238 [2018-04-12 10:54:10,231 INFO L226 Difference]: Without dead ends: 238 [2018-04-12 10:54:10,231 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2070, Invalid=6486, Unknown=0, NotChecked=0, Total=8556 [2018-04-12 10:54:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-04-12 10:54:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-04-12 10:54:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-04-12 10:54:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-04-12 10:54:10,233 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 227 [2018-04-12 10:54:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:10,234 INFO L459 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-04-12 10:54:10,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-04-12 10:54:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-04-12 10:54:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-04-12 10:54:10,235 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:10,235 INFO L355 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:10,235 INFO L408 AbstractCegarLoop]: === Iteration 50 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:10,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1352733737, now seen corresponding path program 45 times [2018-04-12 10:54:10,235 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:10,235 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:10,236 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:10,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:10,236 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:10,246 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:10,741 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:10,741 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:10,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:54:11,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-04-12 10:54:11,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:11,042 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:11,113 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:11,113 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-04-12 10:54:11,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-12 10:54:11,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-12 10:54:11,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-04-12 10:54:11,114 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 49 states. [2018-04-12 10:54:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:11,879 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-04-12 10:54:11,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-04-12 10:54:11,879 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 232 [2018-04-12 10:54:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:11,880 INFO L225 Difference]: With dead ends: 243 [2018-04-12 10:54:11,880 INFO L226 Difference]: Without dead ends: 243 [2018-04-12 10:54:11,880 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3246, Invalid=5496, Unknown=0, NotChecked=0, Total=8742 [2018-04-12 10:54:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-04-12 10:54:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-04-12 10:54:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-04-12 10:54:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-04-12 10:54:11,882 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 232 [2018-04-12 10:54:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:11,882 INFO L459 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-04-12 10:54:11,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-12 10:54:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-04-12 10:54:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-04-12 10:54:11,883 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:11,883 INFO L355 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:11,883 INFO L408 AbstractCegarLoop]: === Iteration 51 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1337046138, now seen corresponding path program 46 times [2018-04-12 10:54:11,883 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:11,883 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:11,884 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:11,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:11,884 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:11,893 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:12,389 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:12,389 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:12,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:54:12,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:54:12,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:12,421 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:13,150 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:13,150 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 96 [2018-04-12 10:54:13,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-12 10:54:13,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-12 10:54:13,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=6960, Unknown=0, NotChecked=0, Total=9312 [2018-04-12 10:54:13,151 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 97 states. [2018-04-12 10:54:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:15,119 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2018-04-12 10:54:15,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-04-12 10:54:15,120 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 237 [2018-04-12 10:54:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:15,121 INFO L225 Difference]: With dead ends: 248 [2018-04-12 10:54:15,121 INFO L226 Difference]: Without dead ends: 248 [2018-04-12 10:54:15,121 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2352, Invalid=6960, Unknown=0, NotChecked=0, Total=9312 [2018-04-12 10:54:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-04-12 10:54:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-04-12 10:54:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-04-12 10:54:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-04-12 10:54:15,123 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 237 [2018-04-12 10:54:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:15,123 INFO L459 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-04-12 10:54:15,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-12 10:54:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-04-12 10:54:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-04-12 10:54:15,124 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:15,124 INFO L355 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:15,124 INFO L408 AbstractCegarLoop]: === Iteration 52 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash 868376887, now seen corresponding path program 47 times [2018-04-12 10:54:15,125 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:15,125 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:15,125 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:15,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:15,125 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:15,131 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:15,640 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:15,640 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:15,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:54:16,224 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-04-12 10:54:16,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:16,228 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:16,967 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:16,967 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2018-04-12 10:54:16,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-04-12 10:54:16,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-04-12 10:54:16,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-04-12 10:54:16,968 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 98 states. [2018-04-12 10:54:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:19,482 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-04-12 10:54:19,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-04-12 10:54:19,482 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-04-12 10:54:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:19,483 INFO L225 Difference]: With dead ends: 253 [2018-04-12 10:54:19,483 INFO L226 Difference]: Without dead ends: 253 [2018-04-12 10:54:19,484 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2499, Invalid=7203, Unknown=0, NotChecked=0, Total=9702 [2018-04-12 10:54:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-04-12 10:54:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-04-12 10:54:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-04-12 10:54:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-04-12 10:54:19,485 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 242 [2018-04-12 10:54:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:19,486 INFO L459 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-04-12 10:54:19,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-04-12 10:54:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-04-12 10:54:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-04-12 10:54:19,486 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:19,486 INFO L355 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:19,486 INFO L408 AbstractCegarLoop]: === Iteration 53 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1130548698, now seen corresponding path program 48 times [2018-04-12 10:54:19,487 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:19,487 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:19,487 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:19,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:19,487 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:19,493 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:19,968 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:19,968 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:19,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:54:20,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-04-12 10:54:20,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:20,166 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:20,709 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:20,709 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 68 [2018-04-12 10:54:20,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-04-12 10:54:20,710 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-04-12 10:54:20,711 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1432, Invalid=3260, Unknown=0, NotChecked=0, Total=4692 [2018-04-12 10:54:20,711 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 69 states. [2018-04-12 10:54:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:22,622 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2018-04-12 10:54:22,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-04-12 10:54:22,622 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 247 [2018-04-12 10:54:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:22,623 INFO L225 Difference]: With dead ends: 258 [2018-04-12 10:54:22,623 INFO L226 Difference]: Without dead ends: 258 [2018-04-12 10:54:22,624 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3855, Invalid=9717, Unknown=0, NotChecked=0, Total=13572 [2018-04-12 10:54:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-04-12 10:54:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-04-12 10:54:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-04-12 10:54:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2018-04-12 10:54:22,625 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 247 [2018-04-12 10:54:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:22,625 INFO L459 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2018-04-12 10:54:22,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-04-12 10:54:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2018-04-12 10:54:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-04-12 10:54:22,626 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:22,626 INFO L355 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:22,627 INFO L408 AbstractCegarLoop]: === Iteration 54 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:22,627 INFO L82 PathProgramCache]: Analyzing trace with hash 869965463, now seen corresponding path program 49 times [2018-04-12 10:54:22,627 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:22,627 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:22,627 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:22,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:22,628 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:22,637 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:23,166 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:23,167 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:23,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:54:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:23,196 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:23,876 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:23,877 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 102 [2018-04-12 10:54:23,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-04-12 10:54:23,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-04-12 10:54:23,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-04-12 10:54:23,878 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 103 states. [2018-04-12 10:54:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:26,266 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-04-12 10:54:26,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-04-12 10:54:26,266 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 252 [2018-04-12 10:54:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:26,267 INFO L225 Difference]: With dead ends: 263 [2018-04-12 10:54:26,267 INFO L226 Difference]: Without dead ends: 263 [2018-04-12 10:54:26,267 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-04-12 10:54:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-04-12 10:54:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-04-12 10:54:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-04-12 10:54:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-04-12 10:54:26,269 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 252 [2018-04-12 10:54:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:26,269 INFO L459 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-04-12 10:54:26,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-04-12 10:54:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-04-12 10:54:26,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-04-12 10:54:26,270 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:26,270 INFO L355 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:26,270 INFO L408 AbstractCegarLoop]: === Iteration 55 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash -957067066, now seen corresponding path program 50 times [2018-04-12 10:54:26,270 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:26,271 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:26,271 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:26,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:54:26,271 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:26,283 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:26,845 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:26,845 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:26,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:54:26,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:54:26,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:26,897 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:27,607 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:27,608 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 104 [2018-04-12 10:54:27,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-04-12 10:54:27,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-04-12 10:54:27,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2756, Invalid=8164, Unknown=0, NotChecked=0, Total=10920 [2018-04-12 10:54:27,609 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 105 states. [2018-04-12 10:54:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:30,526 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-04-12 10:54:30,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-04-12 10:54:30,526 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 257 [2018-04-12 10:54:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:30,527 INFO L225 Difference]: With dead ends: 268 [2018-04-12 10:54:30,527 INFO L226 Difference]: Without dead ends: 268 [2018-04-12 10:54:30,527 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5047 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2756, Invalid=8164, Unknown=0, NotChecked=0, Total=10920 [2018-04-12 10:54:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-04-12 10:54:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-04-12 10:54:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-04-12 10:54:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-04-12 10:54:30,529 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 257 [2018-04-12 10:54:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:30,529 INFO L459 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-04-12 10:54:30,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-04-12 10:54:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-04-12 10:54:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-04-12 10:54:30,530 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:30,530 INFO L355 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:30,530 INFO L408 AbstractCegarLoop]: === Iteration 56 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1246602231, now seen corresponding path program 51 times [2018-04-12 10:54:30,530 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:30,530 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:30,531 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:30,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:30,531 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:30,537 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:31,117 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:31,117 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:31,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:54:31,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-04-12 10:54:31,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:31,570 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:31,623 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:31,623 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-04-12 10:54:31,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-12 10:54:31,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-12 10:54:31,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-04-12 10:54:31,624 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 55 states. [2018-04-12 10:54:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:32,593 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-04-12 10:54:32,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-04-12 10:54:32,594 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 262 [2018-04-12 10:54:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:32,594 INFO L225 Difference]: With dead ends: 273 [2018-04-12 10:54:32,594 INFO L226 Difference]: Without dead ends: 273 [2018-04-12 10:54:32,595 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4137, Invalid=6993, Unknown=0, NotChecked=0, Total=11130 [2018-04-12 10:54:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-04-12 10:54:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-04-12 10:54:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-04-12 10:54:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-04-12 10:54:32,597 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 262 [2018-04-12 10:54:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:32,597 INFO L459 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-04-12 10:54:32,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-12 10:54:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-04-12 10:54:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-04-12 10:54:32,599 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:32,599 INFO L355 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:32,599 INFO L408 AbstractCegarLoop]: === Iteration 57 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash -328358042, now seen corresponding path program 52 times [2018-04-12 10:54:32,599 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:32,599 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:32,600 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:32,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:32,600 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:32,612 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:33,193 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:33,193 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:33,200 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:54:33,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:54:33,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:33,230 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:34,017 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:34,017 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 108 [2018-04-12 10:54:34,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-12 10:54:34,018 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-12 10:54:34,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2862, Invalid=8910, Unknown=0, NotChecked=0, Total=11772 [2018-04-12 10:54:34,018 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 109 states. [2018-04-12 10:54:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:36,322 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-04-12 10:54:36,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-04-12 10:54:36,322 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 267 [2018-04-12 10:54:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:36,323 INFO L225 Difference]: With dead ends: 278 [2018-04-12 10:54:36,323 INFO L226 Difference]: Without dead ends: 278 [2018-04-12 10:54:36,324 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2862, Invalid=8910, Unknown=0, NotChecked=0, Total=11772 [2018-04-12 10:54:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-04-12 10:54:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2018-04-12 10:54:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-04-12 10:54:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-04-12 10:54:36,326 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 267 [2018-04-12 10:54:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:36,326 INFO L459 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-04-12 10:54:36,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-12 10:54:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-04-12 10:54:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-04-12 10:54:36,326 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:36,327 INFO L355 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:36,327 INFO L408 AbstractCegarLoop]: === Iteration 58 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2051109207, now seen corresponding path program 53 times [2018-04-12 10:54:36,327 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:36,328 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:36,328 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:36,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:36,328 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:36,340 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:36,976 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:36,976 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:36,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:54:37,877 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-04-12 10:54:37,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:37,882 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:38,793 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:38,793 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2018-04-12 10:54:38,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-04-12 10:54:38,793 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-04-12 10:54:38,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-04-12 10:54:38,794 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 110 states. [2018-04-12 10:54:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:42,656 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-04-12 10:54:42,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-04-12 10:54:42,656 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 272 [2018-04-12 10:54:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:42,657 INFO L225 Difference]: With dead ends: 283 [2018-04-12 10:54:42,657 INFO L226 Difference]: Without dead ends: 283 [2018-04-12 10:54:42,658 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5619 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3135, Invalid=9075, Unknown=0, NotChecked=0, Total=12210 [2018-04-12 10:54:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-04-12 10:54:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-04-12 10:54:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-04-12 10:54:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-04-12 10:54:42,659 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 272 [2018-04-12 10:54:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:42,659 INFO L459 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-04-12 10:54:42,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-04-12 10:54:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-04-12 10:54:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-04-12 10:54:42,660 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:42,660 INFO L355 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:42,660 INFO L408 AbstractCegarLoop]: === Iteration 59 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 832779782, now seen corresponding path program 54 times [2018-04-12 10:54:42,660 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:42,660 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:42,661 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:42,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:42,661 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:42,671 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:43,329 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:43,329 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:43,334 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:54:43,629 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-04-12 10:54:43,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:43,633 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:43,750 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:43,750 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 60 [2018-04-12 10:54:43,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-12 10:54:43,751 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-12 10:54:43,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1558, Invalid=2102, Unknown=0, NotChecked=0, Total=3660 [2018-04-12 10:54:43,751 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 61 states. [2018-04-12 10:54:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:44,908 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2018-04-12 10:54:44,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-04-12 10:54:44,908 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 277 [2018-04-12 10:54:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:44,909 INFO L225 Difference]: With dead ends: 288 [2018-04-12 10:54:44,909 INFO L226 Difference]: Without dead ends: 288 [2018-04-12 10:54:44,909 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4742, Invalid=8368, Unknown=0, NotChecked=0, Total=13110 [2018-04-12 10:54:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-04-12 10:54:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-04-12 10:54:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-04-12 10:54:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2018-04-12 10:54:44,911 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 277 [2018-04-12 10:54:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:44,911 INFO L459 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2018-04-12 10:54:44,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-12 10:54:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2018-04-12 10:54:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-04-12 10:54:44,912 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:44,912 INFO L355 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:44,912 INFO L408 AbstractCegarLoop]: === Iteration 60 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1889794377, now seen corresponding path program 55 times [2018-04-12 10:54:44,912 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:44,912 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:44,912 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:44,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:44,912 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:44,919 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:45,618 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:45,618 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:45,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:54:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:45,652 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:46,484 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:46,484 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 114 [2018-04-12 10:54:46,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-04-12 10:54:46,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-04-12 10:54:46,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3363, Invalid=9747, Unknown=0, NotChecked=0, Total=13110 [2018-04-12 10:54:46,485 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 115 states. [2018-04-12 10:54:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:50,126 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-04-12 10:54:50,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-04-12 10:54:50,126 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 282 [2018-04-12 10:54:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:50,127 INFO L225 Difference]: With dead ends: 293 [2018-04-12 10:54:50,127 INFO L226 Difference]: Without dead ends: 293 [2018-04-12 10:54:50,127 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3363, Invalid=9747, Unknown=0, NotChecked=0, Total=13110 [2018-04-12 10:54:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-04-12 10:54:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-04-12 10:54:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-12 10:54:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-04-12 10:54:50,130 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 282 [2018-04-12 10:54:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:50,130 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-04-12 10:54:50,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-04-12 10:54:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-04-12 10:54:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-04-12 10:54:50,131 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:50,131 INFO L355 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:50,131 INFO L408 AbstractCegarLoop]: === Iteration 61 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash 581893286, now seen corresponding path program 56 times [2018-04-12 10:54:50,132 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:50,132 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:50,132 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:50,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:54:50,132 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:50,141 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:50,799 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:50,799 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:50,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:54:50,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:54:50,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:50,834 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:51,798 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:51,798 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 116 [2018-04-12 10:54:51,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-04-12 10:54:51,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-04-12 10:54:51,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10498, Unknown=0, NotChecked=0, Total=13572 [2018-04-12 10:54:51,800 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 117 states. [2018-04-12 10:54:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:55,582 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-04-12 10:54:55,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-04-12 10:54:55,582 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 287 [2018-04-12 10:54:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:55,583 INFO L225 Difference]: With dead ends: 298 [2018-04-12 10:54:55,583 INFO L226 Difference]: Without dead ends: 298 [2018-04-12 10:54:55,583 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5956 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3074, Invalid=10498, Unknown=0, NotChecked=0, Total=13572 [2018-04-12 10:54:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-04-12 10:54:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-04-12 10:54:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-04-12 10:54:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2018-04-12 10:54:55,585 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 287 [2018-04-12 10:54:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:55,585 INFO L459 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2018-04-12 10:54:55,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-04-12 10:54:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2018-04-12 10:54:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-04-12 10:54:55,586 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:55,586 INFO L355 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:55,586 INFO L408 AbstractCegarLoop]: === Iteration 62 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2109957143, now seen corresponding path program 57 times [2018-04-12 10:54:55,586 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:55,586 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:55,586 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:55,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:55,587 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:55,594 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:56,322 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:56,322 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:56,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:54:56,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-04-12 10:54:56,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:57,000 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:57,060 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:57,061 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-04-12 10:54:57,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-12 10:54:57,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-12 10:54:57,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2018-04-12 10:54:57,061 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 61 states. [2018-04-12 10:54:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:54:58,192 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-04-12 10:54:58,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-04-12 10:54:58,192 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 292 [2018-04-12 10:54:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:54:58,193 INFO L225 Difference]: With dead ends: 303 [2018-04-12 10:54:58,193 INFO L226 Difference]: Without dead ends: 303 [2018-04-12 10:54:58,193 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5136, Invalid=8670, Unknown=0, NotChecked=0, Total=13806 [2018-04-12 10:54:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-04-12 10:54:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-04-12 10:54:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-04-12 10:54:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-04-12 10:54:58,195 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 292 [2018-04-12 10:54:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:54:58,195 INFO L459 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-04-12 10:54:58,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-12 10:54:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-04-12 10:54:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-04-12 10:54:58,196 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:54:58,196 INFO L355 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-04-12 10:54:58,196 INFO L408 AbstractCegarLoop]: === Iteration 63 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:54:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1932196678, now seen corresponding path program 58 times [2018-04-12 10:54:58,196 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:54:58,196 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:54:58,197 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:58,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:54:58,197 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:54:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:54:58,204 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:54:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:58,947 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:54:58,947 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:54:58,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:54:58,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:54:58,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:54:58,985 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:54:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:54:59,859 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:54:59,860 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 120 [2018-04-12 10:54:59,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-04-12 10:54:59,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-04-12 10:54:59,861 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=10860, Unknown=0, NotChecked=0, Total=14520 [2018-04-12 10:54:59,861 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 121 states. [2018-04-12 10:55:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:03,471 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2018-04-12 10:55:03,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-04-12 10:55:03,472 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 297 [2018-04-12 10:55:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:03,472 INFO L225 Difference]: With dead ends: 308 [2018-04-12 10:55:03,472 INFO L226 Difference]: Without dead ends: 308 [2018-04-12 10:55:03,473 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6783 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3660, Invalid=10860, Unknown=0, NotChecked=0, Total=14520 [2018-04-12 10:55:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-04-12 10:55:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-04-12 10:55:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-04-12 10:55:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-04-12 10:55:03,474 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 297 [2018-04-12 10:55:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:03,475 INFO L459 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-04-12 10:55:03,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-04-12 10:55:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-04-12 10:55:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-04-12 10:55:03,475 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:03,476 INFO L355 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:03,476 INFO L408 AbstractCegarLoop]: === Iteration 64 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1038251657, now seen corresponding path program 59 times [2018-04-12 10:55:03,476 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:03,476 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:03,476 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:03,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:03,476 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:03,483 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8673 backedges. 0 proven. 8673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:04,275 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:04,275 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:04,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:55:05,616 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-04-12 10:55:05,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:05,621 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8673 backedges. 0 proven. 8673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:06,711 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:06,711 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 121 [2018-04-12 10:55:06,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-04-12 10:55:06,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-04-12 10:55:06,712 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-04-12 10:55:06,712 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 122 states. [2018-04-12 10:55:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:11,446 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-04-12 10:55:11,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-04-12 10:55:11,446 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 302 [2018-04-12 10:55:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:11,447 INFO L225 Difference]: With dead ends: 313 [2018-04-12 10:55:11,447 INFO L226 Difference]: Without dead ends: 313 [2018-04-12 10:55:11,447 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6963 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3843, Invalid=11163, Unknown=0, NotChecked=0, Total=15006 [2018-04-12 10:55:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-04-12 10:55:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-04-12 10:55:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-04-12 10:55:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2018-04-12 10:55:11,449 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 302 [2018-04-12 10:55:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:11,449 INFO L459 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2018-04-12 10:55:11,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-04-12 10:55:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2018-04-12 10:55:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-04-12 10:55:11,450 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:11,450 INFO L355 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:11,450 INFO L408 AbstractCegarLoop]: === Iteration 65 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:11,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1640943130, now seen corresponding path program 60 times [2018-04-12 10:55:11,450 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:11,450 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:11,451 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:11,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:11,451 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:11,458 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 0 proven. 8970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:12,237 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:12,237 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:12,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:55:12,678 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-04-12 10:55:12,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:12,682 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 0 proven. 8970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:12,850 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:12,850 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 67 [2018-04-12 10:55:12,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-04-12 10:55:12,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-04-12 10:55:12,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1917, Invalid=2639, Unknown=0, NotChecked=0, Total=4556 [2018-04-12 10:55:12,851 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 68 states. [2018-04-12 10:55:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:14,381 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2018-04-12 10:55:14,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-04-12 10:55:14,381 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 307 [2018-04-12 10:55:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:14,382 INFO L225 Difference]: With dead ends: 318 [2018-04-12 10:55:14,382 INFO L226 Difference]: Without dead ends: 318 [2018-04-12 10:55:14,383 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5750, Invalid=10506, Unknown=0, NotChecked=0, Total=16256 [2018-04-12 10:55:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-04-12 10:55:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2018-04-12 10:55:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-04-12 10:55:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2018-04-12 10:55:14,384 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 307 [2018-04-12 10:55:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:14,385 INFO L459 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2018-04-12 10:55:14,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-04-12 10:55:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2018-04-12 10:55:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-04-12 10:55:14,385 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:14,385 INFO L355 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:14,385 INFO L408 AbstractCegarLoop]: === Iteration 66 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1047497001, now seen corresponding path program 61 times [2018-04-12 10:55:14,386 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:14,386 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:14,386 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:14,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:14,386 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:14,393 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9272 backedges. 0 proven. 9272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:15,206 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:15,206 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:15,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:55:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:15,251 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9272 backedges. 0 proven. 9272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:16,197 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:16,197 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 126 [2018-04-12 10:55:16,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-04-12 10:55:16,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-04-12 10:55:16,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=11907, Unknown=0, NotChecked=0, Total=16002 [2018-04-12 10:55:16,198 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 127 states. [2018-04-12 10:55:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:19,026 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2018-04-12 10:55:19,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-04-12 10:55:19,026 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 312 [2018-04-12 10:55:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:19,027 INFO L225 Difference]: With dead ends: 323 [2018-04-12 10:55:19,027 INFO L226 Difference]: Without dead ends: 323 [2018-04-12 10:55:19,028 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4095, Invalid=11907, Unknown=0, NotChecked=0, Total=16002 [2018-04-12 10:55:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-04-12 10:55:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-04-12 10:55:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-04-12 10:55:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-04-12 10:55:19,029 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 312 [2018-04-12 10:55:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:19,029 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-04-12 10:55:19,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-04-12 10:55:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-04-12 10:55:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-04-12 10:55:19,030 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:19,030 INFO L355 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:19,030 INFO L408 AbstractCegarLoop]: === Iteration 67 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2040815482, now seen corresponding path program 62 times [2018-04-12 10:55:19,031 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:19,031 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:19,031 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:19,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:55:19,031 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:19,040 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 9579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:19,895 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:19,895 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:19,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:55:19,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:55:19,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:19,932 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 9579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:20,934 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:20,934 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 128 [2018-04-12 10:55:20,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-04-12 10:55:20,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-04-12 10:55:20,935 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12352, Unknown=0, NotChecked=0, Total=16512 [2018-04-12 10:55:20,935 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 129 states. [2018-04-12 10:55:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:25,509 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2018-04-12 10:55:25,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-04-12 10:55:25,509 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 317 [2018-04-12 10:55:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:25,510 INFO L225 Difference]: With dead ends: 328 [2018-04-12 10:55:25,510 INFO L226 Difference]: Without dead ends: 328 [2018-04-12 10:55:25,510 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7747 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4160, Invalid=12352, Unknown=0, NotChecked=0, Total=16512 [2018-04-12 10:55:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-04-12 10:55:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2018-04-12 10:55:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-04-12 10:55:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-04-12 10:55:25,512 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 317 [2018-04-12 10:55:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:25,512 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-04-12 10:55:25,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-04-12 10:55:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-04-12 10:55:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-04-12 10:55:25,513 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:25,513 INFO L355 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:25,513 INFO L408 AbstractCegarLoop]: === Iteration 68 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash 700591159, now seen corresponding path program 63 times [2018-04-12 10:55:25,513 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:25,513 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:25,514 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:25,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:25,514 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:25,522 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9891 backedges. 0 proven. 9891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:26,463 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:26,463 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:26,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:55:27,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-04-12 10:55:27,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:27,502 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9891 backedges. 0 proven. 9891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:27,575 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:27,575 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-04-12 10:55:27,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-12 10:55:27,576 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-12 10:55:27,576 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2018-04-12 10:55:27,576 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 67 states. [2018-04-12 10:55:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:28,953 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-04-12 10:55:28,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-04-12 10:55:28,954 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 322 [2018-04-12 10:55:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:28,954 INFO L225 Difference]: With dead ends: 333 [2018-04-12 10:55:28,954 INFO L226 Difference]: Without dead ends: 333 [2018-04-12 10:55:28,955 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6243, Invalid=10527, Unknown=0, NotChecked=0, Total=16770 [2018-04-12 10:55:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-04-12 10:55:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-04-12 10:55:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-04-12 10:55:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2018-04-12 10:55:28,957 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 322 [2018-04-12 10:55:28,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:28,957 INFO L459 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2018-04-12 10:55:28,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-12 10:55:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2018-04-12 10:55:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-04-12 10:55:28,958 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:28,958 INFO L355 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:28,958 INFO L408 AbstractCegarLoop]: === Iteration 69 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash 365184806, now seen corresponding path program 64 times [2018-04-12 10:55:28,958 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:28,958 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:28,959 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:28,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:28,959 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:28,966 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10208 backedges. 0 proven. 10208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:30,206 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:30,206 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:30,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:55:30,245 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:55:30,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:30,248 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10208 backedges. 0 proven. 10208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:30,363 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:30,363 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-04-12 10:55:30,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-12 10:55:30,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-12 10:55:30,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-04-12 10:55:30,364 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 67 states. [2018-04-12 10:55:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:34,540 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-04-12 10:55:34,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-04-12 10:55:34,541 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 327 [2018-04-12 10:55:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:34,541 INFO L225 Difference]: With dead ends: 338 [2018-04-12 10:55:34,541 INFO L226 Difference]: Without dead ends: 338 [2018-04-12 10:55:34,542 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-04-12 10:55:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-04-12 10:55:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2018-04-12 10:55:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-04-12 10:55:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 338 transitions. [2018-04-12 10:55:34,543 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 338 transitions. Word has length 327 [2018-04-12 10:55:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:34,543 INFO L459 AbstractCegarLoop]: Abstraction has 338 states and 338 transitions. [2018-04-12 10:55:34,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-12 10:55:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 338 transitions. [2018-04-12 10:55:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-04-12 10:55:34,544 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:34,544 INFO L355 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:34,544 INFO L408 AbstractCegarLoop]: === Iteration 70 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1356376471, now seen corresponding path program 65 times [2018-04-12 10:55:34,545 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:34,545 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:34,545 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:34,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:34,545 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:34,553 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10530 backedges. 0 proven. 10530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:35,546 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:35,546 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:35,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:55:37,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-04-12 10:55:37,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:37,637 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10530 backedges. 0 proven. 10530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:38,976 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:38,976 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67] total 133 [2018-04-12 10:55:38,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-04-12 10:55:38,977 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-04-12 10:55:38,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-04-12 10:55:38,978 INFO L87 Difference]: Start difference. First operand 338 states and 338 transitions. Second operand 134 states. [2018-04-12 10:55:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:43,670 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2018-04-12 10:55:43,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-04-12 10:55:43,670 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 332 [2018-04-12 10:55:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:43,671 INFO L225 Difference]: With dead ends: 343 [2018-04-12 10:55:43,671 INFO L226 Difference]: Without dead ends: 343 [2018-04-12 10:55:43,671 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8451 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4623, Invalid=13467, Unknown=0, NotChecked=0, Total=18090 [2018-04-12 10:55:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-04-12 10:55:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-04-12 10:55:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-04-12 10:55:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-04-12 10:55:43,673 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 332 [2018-04-12 10:55:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:43,673 INFO L459 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-04-12 10:55:43,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-04-12 10:55:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-04-12 10:55:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-04-12 10:55:43,674 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:43,674 INFO L355 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:43,674 INFO L408 AbstractCegarLoop]: === Iteration 71 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash -570087994, now seen corresponding path program 66 times [2018-04-12 10:55:43,674 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:43,675 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:43,675 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:43,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:43,675 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:43,683 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10857 backedges. 0 proven. 10857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:44,633 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:44,633 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:44,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:55:45,198 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-04-12 10:55:45,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:45,202 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10857 backedges. 0 proven. 10857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:45,350 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:45,351 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 72 [2018-04-12 10:55:45,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-12 10:55:45,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-12 10:55:45,351 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2296, Invalid=2960, Unknown=0, NotChecked=0, Total=5256 [2018-04-12 10:55:45,351 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 73 states. [2018-04-12 10:55:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:46,877 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2018-04-12 10:55:46,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-04-12 10:55:46,877 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 337 [2018-04-12 10:55:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:46,878 INFO L225 Difference]: With dead ends: 348 [2018-04-12 10:55:46,878 INFO L226 Difference]: Without dead ends: 348 [2018-04-12 10:55:46,879 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6980, Invalid=12202, Unknown=0, NotChecked=0, Total=19182 [2018-04-12 10:55:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-04-12 10:55:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2018-04-12 10:55:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-04-12 10:55:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 348 transitions. [2018-04-12 10:55:46,881 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 348 transitions. Word has length 337 [2018-04-12 10:55:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:46,881 INFO L459 AbstractCegarLoop]: Abstraction has 348 states and 348 transitions. [2018-04-12 10:55:46,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-12 10:55:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 348 transitions. [2018-04-12 10:55:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-04-12 10:55:46,882 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:46,882 INFO L355 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:46,882 INFO L408 AbstractCegarLoop]: === Iteration 72 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1787171081, now seen corresponding path program 67 times [2018-04-12 10:55:46,882 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:46,882 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:46,882 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:46,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:46,883 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:46,891 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11189 backedges. 0 proven. 11189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:47,864 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:47,864 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:47,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:55:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:47,908 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11189 backedges. 0 proven. 11189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:49,078 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:49,079 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69] total 138 [2018-04-12 10:55:49,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-04-12 10:55:49,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-04-12 10:55:49,080 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4899, Invalid=14283, Unknown=0, NotChecked=0, Total=19182 [2018-04-12 10:55:49,080 INFO L87 Difference]: Start difference. First operand 348 states and 348 transitions. Second operand 139 states. [2018-04-12 10:55:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:53,311 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-04-12 10:55:53,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-04-12 10:55:53,339 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 342 [2018-04-12 10:55:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:53,339 INFO L225 Difference]: With dead ends: 353 [2018-04-12 10:55:53,340 INFO L226 Difference]: Without dead ends: 353 [2018-04-12 10:55:53,340 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9111 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4899, Invalid=14283, Unknown=0, NotChecked=0, Total=19182 [2018-04-12 10:55:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-04-12 10:55:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2018-04-12 10:55:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-04-12 10:55:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2018-04-12 10:55:53,342 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 342 [2018-04-12 10:55:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:53,342 INFO L459 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2018-04-12 10:55:53,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-04-12 10:55:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2018-04-12 10:55:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-04-12 10:55:53,343 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:53,343 INFO L355 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:53,343 INFO L408 AbstractCegarLoop]: === Iteration 73 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1204274074, now seen corresponding path program 68 times [2018-04-12 10:55:53,343 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:53,343 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:53,344 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:53,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:55:53,344 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:53,352 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11526 backedges. 0 proven. 11526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:54,332 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:54,332 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:54,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:55:54,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:55:54,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:55:54,372 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:55:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11526 backedges. 0 proven. 11526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:55,633 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:55:55,634 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 140 [2018-04-12 10:55:55,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-04-12 10:55:55,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-04-12 10:55:55,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4830, Invalid=14910, Unknown=0, NotChecked=0, Total=19740 [2018-04-12 10:55:55,635 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand 141 states. [2018-04-12 10:55:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:55:58,820 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2018-04-12 10:55:58,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-04-12 10:55:58,820 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 347 [2018-04-12 10:55:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:55:58,821 INFO L225 Difference]: With dead ends: 358 [2018-04-12 10:55:58,821 INFO L226 Difference]: Without dead ends: 358 [2018-04-12 10:55:58,821 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9170 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4830, Invalid=14910, Unknown=0, NotChecked=0, Total=19740 [2018-04-12 10:55:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-04-12 10:55:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2018-04-12 10:55:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-04-12 10:55:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 358 transitions. [2018-04-12 10:55:58,823 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 358 transitions. Word has length 347 [2018-04-12 10:55:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:55:58,824 INFO L459 AbstractCegarLoop]: Abstraction has 358 states and 358 transitions. [2018-04-12 10:55:58,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-04-12 10:55:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 358 transitions. [2018-04-12 10:55:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-04-12 10:55:58,824 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:55:58,825 INFO L355 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-04-12 10:55:58,825 INFO L408 AbstractCegarLoop]: === Iteration 74 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:55:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1093927849, now seen corresponding path program 69 times [2018-04-12 10:55:58,825 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:55:58,825 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:55:58,825 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:58,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:55:58,825 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:55:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:55:58,834 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:55:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11868 backedges. 0 proven. 11868 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:55:59,871 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:55:59,871 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:55:59,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:56:01,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-04-12 10:56:01,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:01,346 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11868 backedges. 0 proven. 11868 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:01,488 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:01,489 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-04-12 10:56:01,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-12 10:56:01,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-12 10:56:01,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=2766, Unknown=0, NotChecked=0, Total=5256 [2018-04-12 10:56:01,490 INFO L87 Difference]: Start difference. First operand 358 states and 358 transitions. Second operand 73 states. [2018-04-12 10:56:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:03,171 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2018-04-12 10:56:03,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-04-12 10:56:03,171 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 352 [2018-04-12 10:56:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:03,172 INFO L225 Difference]: With dead ends: 363 [2018-04-12 10:56:03,172 INFO L226 Difference]: Without dead ends: 363 [2018-04-12 10:56:03,173 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7458, Invalid=12564, Unknown=0, NotChecked=0, Total=20022 [2018-04-12 10:56:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-04-12 10:56:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-04-12 10:56:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-04-12 10:56:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-04-12 10:56:03,175 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 352 [2018-04-12 10:56:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:03,175 INFO L459 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-04-12 10:56:03,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-12 10:56:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-04-12 10:56:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-04-12 10:56:03,176 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:03,176 INFO L355 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:03,176 INFO L408 AbstractCegarLoop]: === Iteration 75 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1693944582, now seen corresponding path program 70 times [2018-04-12 10:56:03,176 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:03,176 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:03,177 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:03,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:03,177 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:03,185 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12215 backedges. 0 proven. 12215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:04,220 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:04,220 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:04,225 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:56:04,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:56:04,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:04,262 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12215 backedges. 0 proven. 12215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:05,578 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:05,578 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 144 [2018-04-12 10:56:05,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-04-12 10:56:05,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-04-12 10:56:05,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5256, Invalid=15624, Unknown=0, NotChecked=0, Total=20880 [2018-04-12 10:56:05,580 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 145 states. [2018-04-12 10:56:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:09,308 INFO L93 Difference]: Finished difference Result 368 states and 368 transitions. [2018-04-12 10:56:09,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-04-12 10:56:09,308 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 357 [2018-04-12 10:56:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:09,309 INFO L225 Difference]: With dead ends: 368 [2018-04-12 10:56:09,309 INFO L226 Difference]: Without dead ends: 368 [2018-04-12 10:56:09,310 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9867 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5256, Invalid=15624, Unknown=0, NotChecked=0, Total=20880 [2018-04-12 10:56:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-04-12 10:56:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2018-04-12 10:56:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-04-12 10:56:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 368 transitions. [2018-04-12 10:56:09,312 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 368 transitions. Word has length 357 [2018-04-12 10:56:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:09,312 INFO L459 AbstractCegarLoop]: Abstraction has 368 states and 368 transitions. [2018-04-12 10:56:09,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-04-12 10:56:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 368 transitions. [2018-04-12 10:56:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-04-12 10:56:09,313 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:09,313 INFO L355 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:09,313 INFO L408 AbstractCegarLoop]: === Iteration 76 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:09,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1551159735, now seen corresponding path program 71 times [2018-04-12 10:56:09,313 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:09,313 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:09,314 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:09,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:09,314 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:09,323 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12567 backedges. 0 proven. 12567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:10,461 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:10,461 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:10,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:56:13,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-04-12 10:56:13,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:13,245 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12567 backedges. 0 proven. 12567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:14,794 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:14,794 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73] total 145 [2018-04-12 10:56:14,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-04-12 10:56:14,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-04-12 10:56:14,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-04-12 10:56:14,795 INFO L87 Difference]: Start difference. First operand 368 states and 368 transitions. Second operand 146 states. [2018-04-12 10:56:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:18,569 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-04-12 10:56:18,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-04-12 10:56:18,570 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 362 [2018-04-12 10:56:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:18,570 INFO L225 Difference]: With dead ends: 373 [2018-04-12 10:56:18,571 INFO L226 Difference]: Without dead ends: 373 [2018-04-12 10:56:18,571 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5475, Invalid=15987, Unknown=0, NotChecked=0, Total=21462 [2018-04-12 10:56:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-04-12 10:56:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2018-04-12 10:56:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-04-12 10:56:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 373 transitions. [2018-04-12 10:56:18,573 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 373 transitions. Word has length 362 [2018-04-12 10:56:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:18,573 INFO L459 AbstractCegarLoop]: Abstraction has 373 states and 373 transitions. [2018-04-12 10:56:18,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-04-12 10:56:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 373 transitions. [2018-04-12 10:56:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-04-12 10:56:18,574 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:18,575 INFO L355 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:18,575 INFO L408 AbstractCegarLoop]: === Iteration 77 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash 744296870, now seen corresponding path program 72 times [2018-04-12 10:56:18,575 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:18,575 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:18,575 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:18,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:18,575 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:18,584 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12924 backedges. 0 proven. 12924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:19,747 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:19,747 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:19,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:56:20,491 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-04-12 10:56:20,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:20,496 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12924 backedges. 0 proven. 12924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:20,842 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:20,842 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 84 [2018-04-12 10:56:20,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-12 10:56:20,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-12 10:56:20,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2776, Invalid=4364, Unknown=0, NotChecked=0, Total=7140 [2018-04-12 10:56:20,843 INFO L87 Difference]: Start difference. First operand 373 states and 373 transitions. Second operand 85 states. [2018-04-12 10:56:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:23,416 INFO L93 Difference]: Finished difference Result 378 states and 378 transitions. [2018-04-12 10:56:23,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-04-12 10:56:23,416 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 367 [2018-04-12 10:56:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:23,417 INFO L225 Difference]: With dead ends: 378 [2018-04-12 10:56:23,417 INFO L226 Difference]: Without dead ends: 378 [2018-04-12 10:56:23,418 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8291, Invalid=16201, Unknown=0, NotChecked=0, Total=24492 [2018-04-12 10:56:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-04-12 10:56:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2018-04-12 10:56:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2018-04-12 10:56:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 378 transitions. [2018-04-12 10:56:23,419 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 378 transitions. Word has length 367 [2018-04-12 10:56:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:23,420 INFO L459 AbstractCegarLoop]: Abstraction has 378 states and 378 transitions. [2018-04-12 10:56:23,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-12 10:56:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 378 transitions. [2018-04-12 10:56:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-04-12 10:56:23,420 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:23,421 INFO L355 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:23,421 INFO L408 AbstractCegarLoop]: === Iteration 78 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash 647655191, now seen corresponding path program 73 times [2018-04-12 10:56:23,421 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:23,421 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:23,421 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:23,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:23,421 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:23,430 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 0 proven. 13286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:24,624 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:24,624 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:24,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:56:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:24,666 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 0 proven. 13286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:26,030 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:26,030 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75] total 150 [2018-04-12 10:56:26,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-04-12 10:56:26,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-04-12 10:56:26,032 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5775, Invalid=16875, Unknown=0, NotChecked=0, Total=22650 [2018-04-12 10:56:26,032 INFO L87 Difference]: Start difference. First operand 378 states and 378 transitions. Second operand 151 states. [2018-04-12 10:56:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:31,020 INFO L93 Difference]: Finished difference Result 383 states and 383 transitions. [2018-04-12 10:56:31,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-04-12 10:56:31,020 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 372 [2018-04-12 10:56:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:31,021 INFO L225 Difference]: With dead ends: 383 [2018-04-12 10:56:31,021 INFO L226 Difference]: Without dead ends: 383 [2018-04-12 10:56:31,021 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10803 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5775, Invalid=16875, Unknown=0, NotChecked=0, Total=22650 [2018-04-12 10:56:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-04-12 10:56:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-04-12 10:56:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-04-12 10:56:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-04-12 10:56:31,023 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 372 [2018-04-12 10:56:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:31,023 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-04-12 10:56:31,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-04-12 10:56:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-04-12 10:56:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-04-12 10:56:31,024 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:31,024 INFO L355 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:31,025 INFO L408 AbstractCegarLoop]: === Iteration 79 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2114113606, now seen corresponding path program 74 times [2018-04-12 10:56:31,025 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:31,025 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:31,025 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:31,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:56:31,025 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:31,034 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13653 backedges. 0 proven. 13653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:32,230 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:32,230 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:32,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:56:32,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:56:32,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:32,295 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13653 backedges. 0 proven. 13653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:33,777 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:33,777 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76] total 152 [2018-04-12 10:56:33,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-04-12 10:56:33,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-04-12 10:56:33,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5852, Invalid=17404, Unknown=0, NotChecked=0, Total=23256 [2018-04-12 10:56:33,779 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 153 states. [2018-04-12 10:56:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:39,128 INFO L93 Difference]: Finished difference Result 388 states and 388 transitions. [2018-04-12 10:56:39,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-04-12 10:56:39,161 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 377 [2018-04-12 10:56:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:39,162 INFO L225 Difference]: With dead ends: 388 [2018-04-12 10:56:39,162 INFO L226 Difference]: Without dead ends: 388 [2018-04-12 10:56:39,163 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11023 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5852, Invalid=17404, Unknown=0, NotChecked=0, Total=23256 [2018-04-12 10:56:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-04-12 10:56:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2018-04-12 10:56:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-04-12 10:56:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 388 transitions. [2018-04-12 10:56:39,165 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 388 transitions. Word has length 377 [2018-04-12 10:56:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:39,165 INFO L459 AbstractCegarLoop]: Abstraction has 388 states and 388 transitions. [2018-04-12 10:56:39,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-04-12 10:56:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 388 transitions. [2018-04-12 10:56:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-04-12 10:56:39,166 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:39,166 INFO L355 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:39,166 INFO L408 AbstractCegarLoop]: === Iteration 80 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1575146615, now seen corresponding path program 75 times [2018-04-12 10:56:39,166 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:39,166 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:39,167 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:39,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:39,167 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:39,176 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 14025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:40,421 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:40,421 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:40,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:56:42,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-04-12 10:56:42,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:42,325 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 14025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:42,412 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:42,412 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-04-12 10:56:42,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-04-12 10:56:42,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-04-12 10:56:42,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=3231, Unknown=0, NotChecked=0, Total=6162 [2018-04-12 10:56:42,413 INFO L87 Difference]: Start difference. First operand 388 states and 388 transitions. Second operand 79 states. [2018-04-12 10:56:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:44,213 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-04-12 10:56:44,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-04-12 10:56:44,213 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 382 [2018-04-12 10:56:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:44,214 INFO L225 Difference]: With dead ends: 393 [2018-04-12 10:56:44,214 INFO L226 Difference]: Without dead ends: 393 [2018-04-12 10:56:44,215 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8781, Invalid=14781, Unknown=0, NotChecked=0, Total=23562 [2018-04-12 10:56:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-04-12 10:56:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2018-04-12 10:56:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-04-12 10:56:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2018-04-12 10:56:44,217 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 382 [2018-04-12 10:56:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:44,217 INFO L459 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2018-04-12 10:56:44,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-04-12 10:56:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2018-04-12 10:56:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-04-12 10:56:44,218 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:44,218 INFO L355 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:44,218 INFO L408 AbstractCegarLoop]: === Iteration 81 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1862088986, now seen corresponding path program 76 times [2018-04-12 10:56:44,218 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:44,218 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:44,219 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:44,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:44,219 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:44,227 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14402 backedges. 0 proven. 14402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:45,463 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:45,463 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:45,468 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:56:45,505 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:56:45,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:45,509 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14402 backedges. 0 proven. 14402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:47,057 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:47,057 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 156 [2018-04-12 10:56:47,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-04-12 10:56:47,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-04-12 10:56:47,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6006, Invalid=18486, Unknown=0, NotChecked=0, Total=24492 [2018-04-12 10:56:47,059 INFO L87 Difference]: Start difference. First operand 393 states and 393 transitions. Second operand 157 states. [2018-04-12 10:56:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:56:50,992 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2018-04-12 10:56:50,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-04-12 10:56:50,992 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 387 [2018-04-12 10:56:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:56:50,993 INFO L225 Difference]: With dead ends: 398 [2018-04-12 10:56:50,993 INFO L226 Difference]: Without dead ends: 398 [2018-04-12 10:56:50,994 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11466 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6006, Invalid=18486, Unknown=0, NotChecked=0, Total=24492 [2018-04-12 10:56:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-04-12 10:56:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2018-04-12 10:56:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2018-04-12 10:56:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 398 transitions. [2018-04-12 10:56:50,996 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 398 transitions. Word has length 387 [2018-04-12 10:56:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:56:50,996 INFO L459 AbstractCegarLoop]: Abstraction has 398 states and 398 transitions. [2018-04-12 10:56:50,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-04-12 10:56:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 398 transitions. [2018-04-12 10:56:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-04-12 10:56:50,997 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:56:50,997 INFO L355 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-04-12 10:56:50,997 INFO L408 AbstractCegarLoop]: === Iteration 82 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:56:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash 729022935, now seen corresponding path program 77 times [2018-04-12 10:56:50,997 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:56:50,997 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:56:50,998 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:50,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:56:50,998 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:56:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:56:51,006 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:56:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14784 backedges. 0 proven. 14784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:52,298 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:56:52,298 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:56:52,303 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:56:56,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-04-12 10:56:56,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:56:56,210 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:56:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14784 backedges. 0 proven. 14784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:56:57,984 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:56:57,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79] total 157 [2018-04-12 10:56:57,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-04-12 10:56:57,985 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-04-12 10:56:57,986 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6319, Invalid=18487, Unknown=0, NotChecked=0, Total=24806 [2018-04-12 10:56:57,986 INFO L87 Difference]: Start difference. First operand 398 states and 398 transitions. Second operand 158 states. [2018-04-12 10:57:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:04,025 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2018-04-12 10:57:04,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-04-12 10:57:04,025 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 392 [2018-04-12 10:57:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:04,026 INFO L225 Difference]: With dead ends: 403 [2018-04-12 10:57:04,026 INFO L226 Difference]: Without dead ends: 403 [2018-04-12 10:57:04,027 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11859 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6399, Invalid=18723, Unknown=0, NotChecked=0, Total=25122 [2018-04-12 10:57:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-04-12 10:57:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-04-12 10:57:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-04-12 10:57:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-04-12 10:57:04,029 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 392 [2018-04-12 10:57:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:04,029 INFO L459 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-04-12 10:57:04,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-04-12 10:57:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-04-12 10:57:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-04-12 10:57:04,030 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:04,030 INFO L355 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:04,030 INFO L408 AbstractCegarLoop]: === Iteration 83 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash 66516358, now seen corresponding path program 78 times [2018-04-12 10:57:04,030 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:04,030 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:04,031 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:04,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:57:04,031 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:04,040 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15171 backedges. 0 proven. 15171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:05,343 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:05,343 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:05,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:57:06,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-04-12 10:57:06,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:57:06,342 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15171 backedges. 0 proven. 15171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:06,513 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:06,513 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 84 [2018-04-12 10:57:06,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-12 10:57:06,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-12 10:57:06,514 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3178, Invalid=3962, Unknown=0, NotChecked=0, Total=7140 [2018-04-12 10:57:06,514 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 85 states. [2018-04-12 10:57:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:08,602 INFO L93 Difference]: Finished difference Result 408 states and 408 transitions. [2018-04-12 10:57:08,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-04-12 10:57:08,603 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 397 [2018-04-12 10:57:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:08,604 INFO L225 Difference]: With dead ends: 408 [2018-04-12 10:57:08,604 INFO L226 Difference]: Without dead ends: 408 [2018-04-12 10:57:08,605 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9650, Invalid=16756, Unknown=0, NotChecked=0, Total=26406 [2018-04-12 10:57:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2018-04-12 10:57:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2018-04-12 10:57:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2018-04-12 10:57:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 408 transitions. [2018-04-12 10:57:08,607 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 408 transitions. Word has length 397 [2018-04-12 10:57:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:08,608 INFO L459 AbstractCegarLoop]: Abstraction has 408 states and 408 transitions. [2018-04-12 10:57:08,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-12 10:57:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 408 transitions. [2018-04-12 10:57:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-04-12 10:57:08,609 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:08,609 INFO L355 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:08,609 INFO L408 AbstractCegarLoop]: === Iteration 84 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 15988535, now seen corresponding path program 79 times [2018-04-12 10:57:08,609 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:08,609 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:08,610 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:08,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:57:08,610 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:08,619 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15563 backedges. 0 proven. 15563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:09,981 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:09,981 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:09,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:57:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:10,027 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15563 backedges. 0 proven. 15563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:11,591 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:11,591 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81] total 162 [2018-04-12 10:57:11,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-04-12 10:57:11,592 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-04-12 10:57:11,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6723, Invalid=19683, Unknown=0, NotChecked=0, Total=26406 [2018-04-12 10:57:11,593 INFO L87 Difference]: Start difference. First operand 408 states and 408 transitions. Second operand 163 states. [2018-04-12 10:57:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:17,079 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-04-12 10:57:17,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-04-12 10:57:17,079 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 402 [2018-04-12 10:57:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:17,080 INFO L225 Difference]: With dead ends: 413 [2018-04-12 10:57:17,080 INFO L226 Difference]: Without dead ends: 413 [2018-04-12 10:57:17,081 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12639 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6723, Invalid=19683, Unknown=0, NotChecked=0, Total=26406 [2018-04-12 10:57:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-04-12 10:57:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2018-04-12 10:57:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2018-04-12 10:57:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 413 transitions. [2018-04-12 10:57:17,083 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 413 transitions. Word has length 402 [2018-04-12 10:57:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:17,083 INFO L459 AbstractCegarLoop]: Abstraction has 413 states and 413 transitions. [2018-04-12 10:57:17,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-04-12 10:57:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 413 transitions. [2018-04-12 10:57:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-04-12 10:57:17,084 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:17,085 INFO L355 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:17,085 INFO L408 AbstractCegarLoop]: === Iteration 85 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2096716838, now seen corresponding path program 80 times [2018-04-12 10:57:17,085 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:17,085 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:17,085 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:17,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:57:17,085 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:17,096 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15960 backedges. 0 proven. 15960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:18,378 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:18,378 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:18,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:57:18,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:57:18,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:57:18,430 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15960 backedges. 0 proven. 15960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:20,455 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:20,455 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82] total 164 [2018-04-12 10:57:20,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-04-12 10:57:20,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-04-12 10:57:20,457 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5658, Invalid=21402, Unknown=0, NotChecked=0, Total=27060 [2018-04-12 10:57:20,457 INFO L87 Difference]: Start difference. First operand 413 states and 413 transitions. Second operand 165 states. [2018-04-12 10:57:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:24,554 INFO L93 Difference]: Finished difference Result 418 states and 418 transitions. [2018-04-12 10:57:24,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-04-12 10:57:24,554 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 407 [2018-04-12 10:57:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:24,555 INFO L225 Difference]: With dead ends: 418 [2018-04-12 10:57:24,555 INFO L226 Difference]: Without dead ends: 418 [2018-04-12 10:57:24,556 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11624 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5658, Invalid=21402, Unknown=0, NotChecked=0, Total=27060 [2018-04-12 10:57:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2018-04-12 10:57:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2018-04-12 10:57:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2018-04-12 10:57:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 418 transitions. [2018-04-12 10:57:24,558 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 418 transitions. Word has length 407 [2018-04-12 10:57:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:24,558 INFO L459 AbstractCegarLoop]: Abstraction has 418 states and 418 transitions. [2018-04-12 10:57:24,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-04-12 10:57:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 418 transitions. [2018-04-12 10:57:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-04-12 10:57:24,560 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:24,560 INFO L355 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:24,560 INFO L408 AbstractCegarLoop]: === Iteration 86 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash -125258601, now seen corresponding path program 81 times [2018-04-12 10:57:24,560 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:24,560 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:24,560 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:24,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:57:24,561 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:24,571 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16362 backedges. 0 proven. 16362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:25,974 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:25,974 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:25,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:57:28,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-04-12 10:57:28,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:57:28,492 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16362 backedges. 0 proven. 16362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:28,614 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:28,614 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-04-12 10:57:28,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-12 10:57:28,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-12 10:57:28,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3408, Invalid=3732, Unknown=0, NotChecked=0, Total=7140 [2018-04-12 10:57:28,615 INFO L87 Difference]: Start difference. First operand 418 states and 418 transitions. Second operand 85 states. [2018-04-12 10:57:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:30,665 INFO L93 Difference]: Finished difference Result 423 states and 423 transitions. [2018-04-12 10:57:30,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-04-12 10:57:30,665 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 412 [2018-04-12 10:57:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:30,666 INFO L225 Difference]: With dead ends: 423 [2018-04-12 10:57:30,666 INFO L226 Difference]: Without dead ends: 423 [2018-04-12 10:57:30,667 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10212, Invalid=17178, Unknown=0, NotChecked=0, Total=27390 [2018-04-12 10:57:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-04-12 10:57:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-04-12 10:57:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-04-12 10:57:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-04-12 10:57:30,669 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 412 [2018-04-12 10:57:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:30,669 INFO L459 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-04-12 10:57:30,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-12 10:57:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-04-12 10:57:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-04-12 10:57:30,670 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:30,670 INFO L355 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:30,670 INFO L408 AbstractCegarLoop]: === Iteration 87 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1235483334, now seen corresponding path program 82 times [2018-04-12 10:57:30,671 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:30,671 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:30,671 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:30,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:57:30,671 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:30,680 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16769 backedges. 0 proven. 16769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:32,115 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:32,115 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:32,120 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:57:32,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:57:32,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:57:32,169 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16769 backedges. 0 proven. 16769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:33,884 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:33,884 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 168 [2018-04-12 10:57:33,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-04-12 10:57:33,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-04-12 10:57:33,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=21252, Unknown=0, NotChecked=0, Total=28392 [2018-04-12 10:57:33,886 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 169 states. [2018-04-12 10:57:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:38,274 INFO L93 Difference]: Finished difference Result 428 states and 428 transitions. [2018-04-12 10:57:38,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-04-12 10:57:38,274 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 417 [2018-04-12 10:57:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:38,275 INFO L225 Difference]: With dead ends: 428 [2018-04-12 10:57:38,275 INFO L226 Difference]: Without dead ends: 428 [2018-04-12 10:57:38,276 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13527 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7140, Invalid=21252, Unknown=0, NotChecked=0, Total=28392 [2018-04-12 10:57:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2018-04-12 10:57:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2018-04-12 10:57:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-04-12 10:57:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 428 transitions. [2018-04-12 10:57:38,278 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 428 transitions. Word has length 417 [2018-04-12 10:57:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:38,278 INFO L459 AbstractCegarLoop]: Abstraction has 428 states and 428 transitions. [2018-04-12 10:57:38,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-04-12 10:57:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 428 transitions. [2018-04-12 10:57:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-04-12 10:57:38,279 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:38,279 INFO L355 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:38,279 INFO L408 AbstractCegarLoop]: === Iteration 88 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash 886585847, now seen corresponding path program 83 times [2018-04-12 10:57:38,279 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:38,279 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:38,280 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:38,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:57:38,280 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:38,297 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17181 backedges. 0 proven. 17181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:39,783 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:39,783 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:39,788 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:57:44,924 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-04-12 10:57:44,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:57:44,931 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17181 backedges. 0 proven. 17181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:46,935 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:46,935 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85] total 169 [2018-04-12 10:57:46,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-04-12 10:57:46,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-04-12 10:57:46,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7309, Invalid=21421, Unknown=0, NotChecked=0, Total=28730 [2018-04-12 10:57:46,937 INFO L87 Difference]: Start difference. First operand 428 states and 428 transitions. Second operand 170 states. [2018-04-12 10:57:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:57:54,225 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-04-12 10:57:54,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-04-12 10:57:54,225 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 422 [2018-04-12 10:57:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:57:54,226 INFO L225 Difference]: With dead ends: 433 [2018-04-12 10:57:54,226 INFO L226 Difference]: Without dead ends: 433 [2018-04-12 10:57:54,227 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13779 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7395, Invalid=21675, Unknown=0, NotChecked=0, Total=29070 [2018-04-12 10:57:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2018-04-12 10:57:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2018-04-12 10:57:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2018-04-12 10:57:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 433 transitions. [2018-04-12 10:57:54,229 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 433 transitions. Word has length 422 [2018-04-12 10:57:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:57:54,229 INFO L459 AbstractCegarLoop]: Abstraction has 433 states and 433 transitions. [2018-04-12 10:57:54,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-04-12 10:57:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 433 transitions. [2018-04-12 10:57:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-04-12 10:57:54,230 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:57:54,230 INFO L355 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-04-12 10:57:54,230 INFO L408 AbstractCegarLoop]: === Iteration 89 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:57:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash -15675034, now seen corresponding path program 84 times [2018-04-12 10:57:54,231 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:57:54,231 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:57:54,231 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:54,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:57:54,231 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:57:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:57:54,249 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:57:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17598 backedges. 0 proven. 17598 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:55,742 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:57:55,742 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:57:55,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:57:57,085 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-04-12 10:57:57,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:57:57,091 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:57:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17598 backedges. 0 proven. 17598 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:57:57,355 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:57:57,355 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 92 [2018-04-12 10:57:57,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-04-12 10:57:57,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-04-12 10:57:57,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3688, Invalid=4868, Unknown=0, NotChecked=0, Total=8556 [2018-04-12 10:57:57,356 INFO L87 Difference]: Start difference. First operand 433 states and 433 transitions. Second operand 93 states. [2018-04-12 10:58:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:00,070 INFO L93 Difference]: Finished difference Result 438 states and 438 transitions. [2018-04-12 10:58:00,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-04-12 10:58:00,098 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 427 [2018-04-12 10:58:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:00,099 INFO L225 Difference]: With dead ends: 438 [2018-04-12 10:58:00,099 INFO L226 Difference]: Without dead ends: 438 [2018-04-12 10:58:00,100 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11157, Invalid=19995, Unknown=0, NotChecked=0, Total=31152 [2018-04-12 10:58:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-04-12 10:58:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2018-04-12 10:58:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2018-04-12 10:58:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 438 transitions. [2018-04-12 10:58:00,102 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 438 transitions. Word has length 427 [2018-04-12 10:58:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:00,103 INFO L459 AbstractCegarLoop]: Abstraction has 438 states and 438 transitions. [2018-04-12 10:58:00,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-04-12 10:58:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 438 transitions. [2018-04-12 10:58:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-04-12 10:58:00,104 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:00,104 INFO L355 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:00,104 INFO L408 AbstractCegarLoop]: === Iteration 90 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1091077975, now seen corresponding path program 85 times [2018-04-12 10:58:00,104 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:00,104 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:00,105 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:00,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:58:00,105 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:00,114 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:58:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:01,651 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:58:01,651 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:58:01,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:58:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:01,699 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:58:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:03,688 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:58:03,688 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87] total 174 [2018-04-12 10:58:03,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-04-12 10:58:03,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-04-12 10:58:03,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7743, Invalid=22707, Unknown=0, NotChecked=0, Total=30450 [2018-04-12 10:58:03,690 INFO L87 Difference]: Start difference. First operand 438 states and 438 transitions. Second operand 175 states. [2018-04-12 10:58:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:08,917 INFO L93 Difference]: Finished difference Result 443 states and 443 transitions. [2018-04-12 10:58:08,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-04-12 10:58:08,918 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 432 [2018-04-12 10:58:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:08,919 INFO L225 Difference]: With dead ends: 443 [2018-04-12 10:58:08,919 INFO L226 Difference]: Without dead ends: 443 [2018-04-12 10:58:08,919 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14619 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7743, Invalid=22707, Unknown=0, NotChecked=0, Total=30450 [2018-04-12 10:58:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-04-12 10:58:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2018-04-12 10:58:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2018-04-12 10:58:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2018-04-12 10:58:08,922 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 432 [2018-04-12 10:58:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:08,922 INFO L459 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2018-04-12 10:58:08,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-04-12 10:58:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2018-04-12 10:58:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-04-12 10:58:08,923 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:08,923 INFO L355 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:08,923 INFO L408 AbstractCegarLoop]: === Iteration 91 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash 433709062, now seen corresponding path program 86 times [2018-04-12 10:58:08,923 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:08,923 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:08,924 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:08,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:58:08,924 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:08,934 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:58:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18447 backedges. 0 proven. 18447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:10,518 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:58:10,518 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:58:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:58:10,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:58:10,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:58:10,568 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:58:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18447 backedges. 0 proven. 18447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:12,504 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:58:12,504 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88] total 176 [2018-04-12 10:58:12,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-04-12 10:58:12,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-04-12 10:58:12,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7832, Invalid=23320, Unknown=0, NotChecked=0, Total=31152 [2018-04-12 10:58:12,506 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 177 states. [2018-04-12 10:58:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:18,450 INFO L93 Difference]: Finished difference Result 448 states and 448 transitions. [2018-04-12 10:58:18,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-04-12 10:58:18,450 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 437 [2018-04-12 10:58:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:18,451 INFO L225 Difference]: With dead ends: 448 [2018-04-12 10:58:18,451 INFO L226 Difference]: Without dead ends: 448 [2018-04-12 10:58:18,452 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14875 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7832, Invalid=23320, Unknown=0, NotChecked=0, Total=31152 [2018-04-12 10:58:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2018-04-12 10:58:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2018-04-12 10:58:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-04-12 10:58:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 448 transitions. [2018-04-12 10:58:18,454 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 448 transitions. Word has length 437 [2018-04-12 10:58:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:18,455 INFO L459 AbstractCegarLoop]: Abstraction has 448 states and 448 transitions. [2018-04-12 10:58:18,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-04-12 10:58:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 448 transitions. [2018-04-12 10:58:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-04-12 10:58:18,456 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:18,456 INFO L355 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:18,456 INFO L408 AbstractCegarLoop]: === Iteration 92 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:18,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1891605687, now seen corresponding path program 87 times [2018-04-12 10:58:18,456 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:18,456 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:18,457 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:18,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:58:18,457 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:18,467 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:58:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18879 backedges. 0 proven. 18879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:20,082 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:58:20,082 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:58:20,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:58:23,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-04-12 10:58:23,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:58:23,414 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:58:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18879 backedges. 0 proven. 18879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:23,531 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:58:23,531 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-04-12 10:58:23,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-04-12 10:58:23,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-04-12 10:58:23,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=4269, Unknown=0, NotChecked=0, Total=8190 [2018-04-12 10:58:23,532 INFO L87 Difference]: Start difference. First operand 448 states and 448 transitions. Second operand 91 states. [2018-04-12 10:58:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:25,889 INFO L93 Difference]: Finished difference Result 453 states and 453 transitions. [2018-04-12 10:58:25,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-04-12 10:58:25,890 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 442 [2018-04-12 10:58:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:25,891 INFO L225 Difference]: With dead ends: 453 [2018-04-12 10:58:25,891 INFO L226 Difference]: Without dead ends: 453 [2018-04-12 10:58:25,891 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11751, Invalid=19755, Unknown=0, NotChecked=0, Total=31506 [2018-04-12 10:58:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-04-12 10:58:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 453. [2018-04-12 10:58:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2018-04-12 10:58:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 453 transitions. [2018-04-12 10:58:25,893 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 453 transitions. Word has length 442 [2018-04-12 10:58:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:25,894 INFO L459 AbstractCegarLoop]: Abstraction has 453 states and 453 transitions. [2018-04-12 10:58:25,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-04-12 10:58:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 453 transitions. [2018-04-12 10:58:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-04-12 10:58:25,895 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:25,895 INFO L355 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:25,895 INFO L408 AbstractCegarLoop]: === Iteration 93 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1642518874, now seen corresponding path program 88 times [2018-04-12 10:58:25,895 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:25,895 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:25,896 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:25,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:58:25,896 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:25,906 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:58:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 19316 backedges. 0 proven. 19316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:27,480 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:58:27,480 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:58:27,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:58:27,527 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:58:27,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:58:27,531 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:58:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19316 backedges. 0 proven. 19316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:29,673 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:58:29,673 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90] total 180 [2018-04-12 10:58:29,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 181 states [2018-04-12 10:58:29,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2018-04-12 10:58:29,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7650, Invalid=24930, Unknown=0, NotChecked=0, Total=32580 [2018-04-12 10:58:29,675 INFO L87 Difference]: Start difference. First operand 453 states and 453 transitions. Second operand 181 states. [2018-04-12 10:58:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:36,064 INFO L93 Difference]: Finished difference Result 458 states and 458 transitions. [2018-04-12 10:58:36,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-04-12 10:58:36,064 INFO L78 Accepts]: Start accepts. Automaton has 181 states. Word has length 447 [2018-04-12 10:58:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:36,065 INFO L225 Difference]: With dead ends: 458 [2018-04-12 10:58:36,065 INFO L226 Difference]: Without dead ends: 458 [2018-04-12 10:58:36,066 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15012 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7650, Invalid=24930, Unknown=0, NotChecked=0, Total=32580 [2018-04-12 10:58:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-04-12 10:58:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2018-04-12 10:58:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-04-12 10:58:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 458 transitions. [2018-04-12 10:58:36,068 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 458 transitions. Word has length 447 [2018-04-12 10:58:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:36,068 INFO L459 AbstractCegarLoop]: Abstraction has 458 states and 458 transitions. [2018-04-12 10:58:36,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 181 states. [2018-04-12 10:58:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 458 transitions. [2018-04-12 10:58:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-04-12 10:58:36,070 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:36,070 INFO L355 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:36,070 INFO L408 AbstractCegarLoop]: === Iteration 94 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1076066839, now seen corresponding path program 89 times [2018-04-12 10:58:36,070 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:36,070 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:36,070 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:36,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:58:36,071 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:36,080 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:58:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19758 backedges. 0 proven. 19758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:37,760 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:58:37,760 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:58:37,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:58:44,561 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-04-12 10:58:44,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:58:44,568 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:58:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19758 backedges. 0 proven. 19758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:46,860 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:58:46,861 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91] total 181 [2018-04-12 10:58:46,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-04-12 10:58:46,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-04-12 10:58:46,862 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8371, Invalid=24571, Unknown=0, NotChecked=0, Total=32942 [2018-04-12 10:58:46,862 INFO L87 Difference]: Start difference. First operand 458 states and 458 transitions. Second operand 182 states. [2018-04-12 10:58:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:52,485 INFO L93 Difference]: Finished difference Result 463 states and 463 transitions. [2018-04-12 10:58:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-04-12 10:58:52,486 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 452 [2018-04-12 10:58:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:52,486 INFO L225 Difference]: With dead ends: 463 [2018-04-12 10:58:52,487 INFO L226 Difference]: Without dead ends: 463 [2018-04-12 10:58:52,487 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15843 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8463, Invalid=24843, Unknown=0, NotChecked=0, Total=33306 [2018-04-12 10:58:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-04-12 10:58:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2018-04-12 10:58:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2018-04-12 10:58:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 463 transitions. [2018-04-12 10:58:52,489 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 463 transitions. Word has length 452 [2018-04-12 10:58:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:52,490 INFO L459 AbstractCegarLoop]: Abstraction has 463 states and 463 transitions. [2018-04-12 10:58:52,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-04-12 10:58:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 463 transitions. [2018-04-12 10:58:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-04-12 10:58:52,491 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:52,491 INFO L355 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:52,491 INFO L408 AbstractCegarLoop]: === Iteration 95 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:52,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1217878714, now seen corresponding path program 90 times [2018-04-12 10:58:52,491 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:52,491 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:52,492 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:52,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:58:52,492 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:52,502 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:58:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20205 backedges. 0 proven. 20205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:54,240 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:58:54,240 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:58:54,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 10:58:56,066 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-04-12 10:58:56,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:58:56,079 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:58:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20205 backedges. 0 proven. 20205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:58:56,277 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:58:56,277 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 96 [2018-04-12 10:58:56,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-12 10:58:56,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-12 10:58:56,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4204, Invalid=5108, Unknown=0, NotChecked=0, Total=9312 [2018-04-12 10:58:56,278 INFO L87 Difference]: Start difference. First operand 463 states and 463 transitions. Second operand 97 states. [2018-04-12 10:58:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:58:58,988 INFO L93 Difference]: Finished difference Result 468 states and 468 transitions. [2018-04-12 10:58:58,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-12 10:58:58,988 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 457 [2018-04-12 10:58:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:58:58,989 INFO L225 Difference]: With dead ends: 468 [2018-04-12 10:58:58,989 INFO L226 Difference]: Without dead ends: 468 [2018-04-12 10:58:58,990 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4456 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12752, Invalid=22030, Unknown=0, NotChecked=0, Total=34782 [2018-04-12 10:58:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2018-04-12 10:58:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2018-04-12 10:58:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2018-04-12 10:58:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 468 transitions. [2018-04-12 10:58:58,992 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 468 transitions. Word has length 457 [2018-04-12 10:58:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:58:58,992 INFO L459 AbstractCegarLoop]: Abstraction has 468 states and 468 transitions. [2018-04-12 10:58:58,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-12 10:58:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 468 transitions. [2018-04-12 10:58:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-04-12 10:58:58,993 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:58:58,993 INFO L355 BasicCegarLoop]: trace histogram [92, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-04-12 10:58:58,993 INFO L408 AbstractCegarLoop]: === Iteration 96 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:58:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1277550729, now seen corresponding path program 91 times [2018-04-12 10:58:58,994 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:58:58,994 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:58:58,994 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:58,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:58:58,994 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:58:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:58:59,004 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:59:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20657 backedges. 0 proven. 20657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:00,758 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:59:00,758 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:59:00,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:59:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:59:00,817 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:59:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20657 backedges. 0 proven. 20657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:03,164 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:59:03,164 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93] total 186 [2018-04-12 10:59:03,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 187 states [2018-04-12 10:59:03,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 187 interpolants. [2018-04-12 10:59:03,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8835, Invalid=25947, Unknown=0, NotChecked=0, Total=34782 [2018-04-12 10:59:03,167 INFO L87 Difference]: Start difference. First operand 468 states and 468 transitions. Second operand 187 states. [2018-04-12 10:59:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:59:10,714 INFO L93 Difference]: Finished difference Result 473 states and 473 transitions. [2018-04-12 10:59:10,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-04-12 10:59:10,714 INFO L78 Accepts]: Start accepts. Automaton has 187 states. Word has length 462 [2018-04-12 10:59:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:59:10,715 INFO L225 Difference]: With dead ends: 473 [2018-04-12 10:59:10,716 INFO L226 Difference]: Without dead ends: 473 [2018-04-12 10:59:10,716 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16743 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8835, Invalid=25947, Unknown=0, NotChecked=0, Total=34782 [2018-04-12 10:59:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2018-04-12 10:59:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2018-04-12 10:59:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-04-12 10:59:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 473 transitions. [2018-04-12 10:59:10,718 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 473 transitions. Word has length 462 [2018-04-12 10:59:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:59:10,719 INFO L459 AbstractCegarLoop]: Abstraction has 473 states and 473 transitions. [2018-04-12 10:59:10,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 187 states. [2018-04-12 10:59:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 473 transitions. [2018-04-12 10:59:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-04-12 10:59:10,720 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:59:10,720 INFO L355 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-04-12 10:59:10,720 INFO L408 AbstractCegarLoop]: === Iteration 97 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:59:10,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1491229670, now seen corresponding path program 92 times [2018-04-12 10:59:10,720 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:59:10,720 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:59:10,721 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:10,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 10:59:10,721 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:59:10,731 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:59:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21114 backedges. 0 proven. 21114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:12,485 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:59:12,485 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:59:12,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 10:59:12,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 10:59:12,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:59:12,541 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:59:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21114 backedges. 0 proven. 21114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:14,740 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:59:14,741 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 188 [2018-04-12 10:59:14,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 189 states [2018-04-12 10:59:14,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2018-04-12 10:59:14,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8742, Invalid=26790, Unknown=0, NotChecked=0, Total=35532 [2018-04-12 10:59:14,743 INFO L87 Difference]: Start difference. First operand 473 states and 473 transitions. Second operand 189 states. [2018-04-12 10:59:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:59:21,826 INFO L93 Difference]: Finished difference Result 478 states and 478 transitions. [2018-04-12 10:59:21,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-04-12 10:59:21,826 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 467 [2018-04-12 10:59:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:59:21,827 INFO L225 Difference]: With dead ends: 478 [2018-04-12 10:59:21,827 INFO L226 Difference]: Without dead ends: 478 [2018-04-12 10:59:21,828 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16826 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8742, Invalid=26790, Unknown=0, NotChecked=0, Total=35532 [2018-04-12 10:59:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2018-04-12 10:59:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2018-04-12 10:59:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2018-04-12 10:59:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2018-04-12 10:59:21,830 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 467 [2018-04-12 10:59:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:59:21,830 INFO L459 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2018-04-12 10:59:21,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 189 states. [2018-04-12 10:59:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2018-04-12 10:59:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-04-12 10:59:21,831 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:59:21,831 INFO L355 BasicCegarLoop]: trace histogram [94, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-04-12 10:59:21,831 INFO L408 AbstractCegarLoop]: === Iteration 98 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:59:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1190556457, now seen corresponding path program 93 times [2018-04-12 10:59:21,832 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:59:21,832 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:59:21,832 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:21,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:59:21,832 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:59:21,842 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:59:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21576 backedges. 0 proven. 21576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:23,661 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:59:23,662 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:59:23,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 10:59:27,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-04-12 10:59:27,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:59:27,914 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:59:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21576 backedges. 0 proven. 21576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:28,036 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:59:28,036 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-04-12 10:59:28,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-12 10:59:28,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-12 10:59:28,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4470, Invalid=4842, Unknown=0, NotChecked=0, Total=9312 [2018-04-12 10:59:28,037 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand 97 states. [2018-04-12 10:59:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:59:30,654 INFO L93 Difference]: Finished difference Result 483 states and 483 transitions. [2018-04-12 10:59:30,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-04-12 10:59:30,654 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 472 [2018-04-12 10:59:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:59:30,655 INFO L225 Difference]: With dead ends: 483 [2018-04-12 10:59:30,655 INFO L226 Difference]: Without dead ends: 483 [2018-04-12 10:59:30,656 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13398, Invalid=22512, Unknown=0, NotChecked=0, Total=35910 [2018-04-12 10:59:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-04-12 10:59:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2018-04-12 10:59:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2018-04-12 10:59:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 483 transitions. [2018-04-12 10:59:30,658 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 483 transitions. Word has length 472 [2018-04-12 10:59:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:59:30,658 INFO L459 AbstractCegarLoop]: Abstraction has 483 states and 483 transitions. [2018-04-12 10:59:30,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-12 10:59:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 483 transitions. [2018-04-12 10:59:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-04-12 10:59:30,659 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:59:30,660 INFO L355 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-04-12 10:59:30,660 INFO L408 AbstractCegarLoop]: === Iteration 99 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:59:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash -585086330, now seen corresponding path program 94 times [2018-04-12 10:59:30,660 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:59:30,660 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:59:30,660 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:30,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:59:30,660 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:59:30,671 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:59:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:32,532 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:59:32,532 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:59:32,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 10:59:32,584 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 10:59:32,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:59:32,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:59:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:34,747 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:59:34,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 192 [2018-04-12 10:59:34,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-04-12 10:59:34,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-04-12 10:59:34,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9312, Invalid=27744, Unknown=0, NotChecked=0, Total=37056 [2018-04-12 10:59:34,750 INFO L87 Difference]: Start difference. First operand 483 states and 483 transitions. Second operand 193 states. [2018-04-12 10:59:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 10:59:41,081 INFO L93 Difference]: Finished difference Result 488 states and 488 transitions. [2018-04-12 10:59:41,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-04-12 10:59:41,081 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 477 [2018-04-12 10:59:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 10:59:41,082 INFO L225 Difference]: With dead ends: 488 [2018-04-12 10:59:41,082 INFO L226 Difference]: Without dead ends: 488 [2018-04-12 10:59:41,083 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17763 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9312, Invalid=27744, Unknown=0, NotChecked=0, Total=37056 [2018-04-12 10:59:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-04-12 10:59:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2018-04-12 10:59:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-04-12 10:59:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 488 transitions. [2018-04-12 10:59:41,085 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 488 transitions. Word has length 477 [2018-04-12 10:59:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 10:59:41,085 INFO L459 AbstractCegarLoop]: Abstraction has 488 states and 488 transitions. [2018-04-12 10:59:41,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-04-12 10:59:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 488 transitions. [2018-04-12 10:59:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-04-12 10:59:41,087 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 10:59:41,087 INFO L355 BasicCegarLoop]: trace histogram [96, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-04-12 10:59:41,087 INFO L408 AbstractCegarLoop]: === Iteration 100 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 10:59:41,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2057846217, now seen corresponding path program 95 times [2018-04-12 10:59:41,087 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 10:59:41,087 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 10:59:41,087 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:41,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 10:59:41,088 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 10:59:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 10:59:41,098 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 10:59:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22515 backedges. 0 proven. 22515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:43,008 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 10:59:43,008 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 10:59:43,013 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 10:59:51,901 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-04-12 10:59:51,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 10:59:51,910 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 10:59:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22515 backedges. 0 proven. 22515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 10:59:54,583 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 10:59:54,583 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97] total 193 [2018-04-12 10:59:54,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-04-12 10:59:54,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-04-12 10:59:54,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9505, Invalid=27937, Unknown=0, NotChecked=0, Total=37442 [2018-04-12 10:59:54,585 INFO L87 Difference]: Start difference. First operand 488 states and 488 transitions. Second operand 194 states. [2018-04-12 11:00:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:00:00,724 INFO L93 Difference]: Finished difference Result 493 states and 493 transitions. [2018-04-12 11:00:00,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-04-12 11:00:00,725 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 482 [2018-04-12 11:00:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:00:00,726 INFO L225 Difference]: With dead ends: 493 [2018-04-12 11:00:00,726 INFO L226 Difference]: Without dead ends: 493 [2018-04-12 11:00:00,727 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18051 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9603, Invalid=28227, Unknown=0, NotChecked=0, Total=37830 [2018-04-12 11:00:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2018-04-12 11:00:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2018-04-12 11:00:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2018-04-12 11:00:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 493 transitions. [2018-04-12 11:00:00,729 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 493 transitions. Word has length 482 [2018-04-12 11:00:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:00:00,729 INFO L459 AbstractCegarLoop]: Abstraction has 493 states and 493 transitions. [2018-04-12 11:00:00,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-04-12 11:00:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 493 transitions. [2018-04-12 11:00:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-04-12 11:00:00,730 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:00:00,731 INFO L355 BasicCegarLoop]: trace histogram [97, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-04-12 11:00:00,731 INFO L408 AbstractCegarLoop]: === Iteration 101 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:00:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1505988314, now seen corresponding path program 96 times [2018-04-12 11:00:00,731 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:00:00,731 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:00:00,731 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:00,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:00:00,731 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:00:00,742 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:00:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22992 backedges. 0 proven. 22992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:02,741 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:00:02,741 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:00:02,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 11:00:04,896 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-04-12 11:00:04,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:00:04,903 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:00:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22992 backedges. 0 proven. 22992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:06,485 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:00:06,485 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 132 [2018-04-12 11:00:06,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-04-12 11:00:06,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-04-12 11:00:06,487 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5416, Invalid=12140, Unknown=0, NotChecked=0, Total=17556 [2018-04-12 11:00:06,487 INFO L87 Difference]: Start difference. First operand 493 states and 493 transitions. Second operand 133 states. [2018-04-12 11:00:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:00:15,529 INFO L93 Difference]: Finished difference Result 498 states and 498 transitions. [2018-04-12 11:00:15,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-04-12 11:00:15,530 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 487 [2018-04-12 11:00:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:00:15,531 INFO L225 Difference]: With dead ends: 498 [2018-04-12 11:00:15,531 INFO L226 Difference]: Without dead ends: 498 [2018-04-12 11:00:15,532 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6991 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=14615, Invalid=37597, Unknown=0, NotChecked=0, Total=52212 [2018-04-12 11:00:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2018-04-12 11:00:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2018-04-12 11:00:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-04-12 11:00:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 498 transitions. [2018-04-12 11:00:15,534 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 498 transitions. Word has length 487 [2018-04-12 11:00:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:00:15,535 INFO L459 AbstractCegarLoop]: Abstraction has 498 states and 498 transitions. [2018-04-12 11:00:15,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-04-12 11:00:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 498 transitions. [2018-04-12 11:00:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-04-12 11:00:15,536 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:00:15,536 INFO L355 BasicCegarLoop]: trace histogram [98, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-04-12 11:00:15,536 INFO L408 AbstractCegarLoop]: === Iteration 102 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:00:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash -152387689, now seen corresponding path program 97 times [2018-04-12 11:00:15,536 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:00:15,537 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:00:15,537 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:15,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:00:15,537 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:00:15,548 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:00:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 23474 backedges. 0 proven. 23474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:17,536 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:00:17,536 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:00:17,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:00:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:00:17,591 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:00:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23474 backedges. 0 proven. 23474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:19,903 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:00:19,903 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99] total 198 [2018-04-12 11:00:19,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 199 states [2018-04-12 11:00:19,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2018-04-12 11:00:19,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9999, Invalid=29403, Unknown=0, NotChecked=0, Total=39402 [2018-04-12 11:00:19,906 INFO L87 Difference]: Start difference. First operand 498 states and 498 transitions. Second operand 199 states. [2018-04-12 11:00:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:00:27,698 INFO L93 Difference]: Finished difference Result 503 states and 503 transitions. [2018-04-12 11:00:27,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-04-12 11:00:27,699 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 492 [2018-04-12 11:00:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:00:27,700 INFO L225 Difference]: With dead ends: 503 [2018-04-12 11:00:27,700 INFO L226 Difference]: Without dead ends: 503 [2018-04-12 11:00:27,701 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19011 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9999, Invalid=29403, Unknown=0, NotChecked=0, Total=39402 [2018-04-12 11:00:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-04-12 11:00:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2018-04-12 11:00:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2018-04-12 11:00:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 503 transitions. [2018-04-12 11:00:27,703 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 503 transitions. Word has length 492 [2018-04-12 11:00:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:00:27,703 INFO L459 AbstractCegarLoop]: Abstraction has 503 states and 503 transitions. [2018-04-12 11:00:27,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 199 states. [2018-04-12 11:00:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 503 transitions. [2018-04-12 11:00:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-04-12 11:00:27,705 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:00:27,705 INFO L355 BasicCegarLoop]: trace histogram [99, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-04-12 11:00:27,705 INFO L408 AbstractCegarLoop]: === Iteration 103 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:00:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1110388794, now seen corresponding path program 98 times [2018-04-12 11:00:27,705 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:00:27,705 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:00:27,705 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:27,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:00:27,706 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:00:27,717 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:00:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23961 backedges. 0 proven. 23961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:29,724 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:00:29,724 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:00:29,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 11:00:29,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 11:00:29,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:00:29,785 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:00:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23961 backedges. 0 proven. 23961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:32,132 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:00:32,133 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100] total 200 [2018-04-12 11:00:32,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2018-04-12 11:00:32,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2018-04-12 11:00:32,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10100, Invalid=30100, Unknown=0, NotChecked=0, Total=40200 [2018-04-12 11:00:32,135 INFO L87 Difference]: Start difference. First operand 503 states and 503 transitions. Second operand 201 states. [2018-04-12 11:00:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:00:41,462 INFO L93 Difference]: Finished difference Result 508 states and 508 transitions. [2018-04-12 11:00:41,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-04-12 11:00:41,462 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 497 [2018-04-12 11:00:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:00:41,463 INFO L225 Difference]: With dead ends: 508 [2018-04-12 11:00:41,463 INFO L226 Difference]: Without dead ends: 508 [2018-04-12 11:00:41,465 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19303 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10100, Invalid=30100, Unknown=0, NotChecked=0, Total=40200 [2018-04-12 11:00:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2018-04-12 11:00:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2018-04-12 11:00:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-04-12 11:00:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 508 transitions. [2018-04-12 11:00:41,468 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 508 transitions. Word has length 497 [2018-04-12 11:00:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:00:41,468 INFO L459 AbstractCegarLoop]: Abstraction has 508 states and 508 transitions. [2018-04-12 11:00:41,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 201 states. [2018-04-12 11:00:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 508 transitions. [2018-04-12 11:00:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2018-04-12 11:00:41,470 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:00:41,470 INFO L355 BasicCegarLoop]: trace histogram [100, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-04-12 11:00:41,470 INFO L408 AbstractCegarLoop]: === Iteration 104 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:00:41,470 INFO L82 PathProgramCache]: Analyzing trace with hash -194476809, now seen corresponding path program 99 times [2018-04-12 11:00:41,470 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:00:41,470 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:00:41,471 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:41,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:00:41,471 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:00:41,482 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:00:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24453 backedges. 0 proven. 24453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:43,538 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:00:43,538 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:00:43,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 11:00:49,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-04-12 11:00:49,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:00:49,078 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:00:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24453 backedges. 0 proven. 24453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:49,222 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:00:49,223 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-04-12 11:00:49,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-04-12 11:00:49,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-04-12 11:00:49,223 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5055, Invalid=5451, Unknown=0, NotChecked=0, Total=10506 [2018-04-12 11:00:49,224 INFO L87 Difference]: Start difference. First operand 508 states and 508 transitions. Second operand 103 states. [2018-04-12 11:00:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:00:52,205 INFO L93 Difference]: Finished difference Result 513 states and 513 transitions. [2018-04-12 11:00:52,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-04-12 11:00:52,205 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 502 [2018-04-12 11:00:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:00:52,206 INFO L225 Difference]: With dead ends: 513 [2018-04-12 11:00:52,206 INFO L226 Difference]: Without dead ends: 513 [2018-04-12 11:00:52,207 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15153, Invalid=25449, Unknown=0, NotChecked=0, Total=40602 [2018-04-12 11:00:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-04-12 11:00:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2018-04-12 11:00:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-04-12 11:00:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 513 transitions. [2018-04-12 11:00:52,209 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 513 transitions. Word has length 502 [2018-04-12 11:00:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:00:52,209 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 513 transitions. [2018-04-12 11:00:52,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-04-12 11:00:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 513 transitions. [2018-04-12 11:00:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-04-12 11:00:52,210 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:00:52,210 INFO L355 BasicCegarLoop]: trace histogram [101, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-04-12 11:00:52,210 INFO L408 AbstractCegarLoop]: === Iteration 105 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:00:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1962370662, now seen corresponding path program 100 times [2018-04-12 11:00:52,211 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:00:52,211 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:00:52,211 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:52,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:00:52,211 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:00:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:00:52,223 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:00:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24950 backedges. 0 proven. 24950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:54,319 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:00:54,319 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:00:54,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 11:00:54,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 11:00:54,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:00:54,381 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:00:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24950 backedges. 0 proven. 24950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:00:56,994 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:00:56,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 204 [2018-04-12 11:00:56,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-04-12 11:00:56,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-04-12 11:00:56,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10302, Invalid=31518, Unknown=0, NotChecked=0, Total=41820 [2018-04-12 11:00:56,997 INFO L87 Difference]: Start difference. First operand 513 states and 513 transitions. Second operand 205 states. [2018-04-12 11:01:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:01:05,973 INFO L93 Difference]: Finished difference Result 518 states and 518 transitions. [2018-04-12 11:01:05,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-04-12 11:01:05,973 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 507 [2018-04-12 11:01:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:01:05,974 INFO L225 Difference]: With dead ends: 518 [2018-04-12 11:01:05,974 INFO L226 Difference]: Without dead ends: 518 [2018-04-12 11:01:05,975 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19890 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10302, Invalid=31518, Unknown=0, NotChecked=0, Total=41820 [2018-04-12 11:01:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2018-04-12 11:01:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2018-04-12 11:01:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2018-04-12 11:01:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 518 transitions. [2018-04-12 11:01:05,977 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 518 transitions. Word has length 507 [2018-04-12 11:01:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:01:05,977 INFO L459 AbstractCegarLoop]: Abstraction has 518 states and 518 transitions. [2018-04-12 11:01:05,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-04-12 11:01:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 518 transitions. [2018-04-12 11:01:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-04-12 11:01:05,978 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:01:05,978 INFO L355 BasicCegarLoop]: trace histogram [102, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-04-12 11:01:05,978 INFO L408 AbstractCegarLoop]: === Iteration 106 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:01:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash -856223145, now seen corresponding path program 101 times [2018-04-12 11:01:05,979 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:01:05,979 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:01:05,979 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:05,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:01:05,979 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:01:05,991 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:01:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25452 backedges. 0 proven. 25452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:08,188 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:01:08,188 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:01:08,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 11:01:19,929 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-04-12 11:01:19,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:01:19,938 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:01:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25452 backedges. 0 proven. 25452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:22,943 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:01:22,944 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103] total 205 [2018-04-12 11:01:22,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-04-12 11:01:22,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-04-12 11:01:22,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10711, Invalid=31519, Unknown=0, NotChecked=0, Total=42230 [2018-04-12 11:01:22,946 INFO L87 Difference]: Start difference. First operand 518 states and 518 transitions. Second operand 206 states. [2018-04-12 11:01:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:01:30,228 INFO L93 Difference]: Finished difference Result 523 states and 523 transitions. [2018-04-12 11:01:30,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-04-12 11:01:30,228 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 512 [2018-04-12 11:01:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:01:30,229 INFO L225 Difference]: With dead ends: 523 [2018-04-12 11:01:30,229 INFO L226 Difference]: Without dead ends: 523 [2018-04-12 11:01:30,231 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20403 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10815, Invalid=31827, Unknown=0, NotChecked=0, Total=42642 [2018-04-12 11:01:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2018-04-12 11:01:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2018-04-12 11:01:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2018-04-12 11:01:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 523 transitions. [2018-04-12 11:01:30,233 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 523 transitions. Word has length 512 [2018-04-12 11:01:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:01:30,233 INFO L459 AbstractCegarLoop]: Abstraction has 523 states and 523 transitions. [2018-04-12 11:01:30,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-04-12 11:01:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 523 transitions. [2018-04-12 11:01:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-04-12 11:01:30,234 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:01:30,234 INFO L355 BasicCegarLoop]: trace histogram [103, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-04-12 11:01:30,234 INFO L408 AbstractCegarLoop]: === Iteration 107 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:01:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 71972102, now seen corresponding path program 102 times [2018-04-12 11:01:30,235 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:01:30,235 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:01:30,235 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:30,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:01:30,235 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:01:30,247 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:01:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25959 backedges. 0 proven. 25959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:32,492 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:01:32,492 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:01:32,497 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 11:01:35,126 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-04-12 11:01:35,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:01:35,133 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:01:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25959 backedges. 0 proven. 25959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:35,401 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:01:35,401 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 108 [2018-04-12 11:01:35,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-12 11:01:35,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-12 11:01:35,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5374, Invalid=6398, Unknown=0, NotChecked=0, Total=11772 [2018-04-12 11:01:35,402 INFO L87 Difference]: Start difference. First operand 523 states and 523 transitions. Second operand 109 states. [2018-04-12 11:01:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:01:38,707 INFO L93 Difference]: Finished difference Result 528 states and 528 transitions. [2018-04-12 11:01:38,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-04-12 11:01:38,708 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 517 [2018-04-12 11:01:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:01:38,708 INFO L225 Difference]: With dead ends: 528 [2018-04-12 11:01:38,708 INFO L226 Difference]: Without dead ends: 528 [2018-04-12 11:01:38,710 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5662 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=16286, Invalid=28024, Unknown=0, NotChecked=0, Total=44310 [2018-04-12 11:01:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2018-04-12 11:01:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2018-04-12 11:01:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2018-04-12 11:01:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 528 transitions. [2018-04-12 11:01:38,712 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 528 transitions. Word has length 517 [2018-04-12 11:01:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:01:38,712 INFO L459 AbstractCegarLoop]: Abstraction has 528 states and 528 transitions. [2018-04-12 11:01:38,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-12 11:01:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 528 transitions. [2018-04-12 11:01:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-04-12 11:01:38,714 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:01:38,714 INFO L355 BasicCegarLoop]: trace histogram [104, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-04-12 11:01:38,714 INFO L408 AbstractCegarLoop]: === Iteration 108 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:01:38,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1740871753, now seen corresponding path program 103 times [2018-04-12 11:01:38,714 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:01:38,714 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:01:38,714 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:38,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:01:38,714 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:01:38,727 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:01:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26471 backedges. 0 proven. 26471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:41,001 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:01:41,001 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:01:41,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:01:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:01:41,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:01:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 26471 backedges. 0 proven. 26471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:43,703 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:01:43,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105] total 210 [2018-04-12 11:01:43,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 211 states [2018-04-12 11:01:43,705 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2018-04-12 11:01:43,705 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11235, Invalid=33075, Unknown=0, NotChecked=0, Total=44310 [2018-04-12 11:01:43,706 INFO L87 Difference]: Start difference. First operand 528 states and 528 transitions. Second operand 211 states. [2018-04-12 11:01:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:01:50,834 INFO L93 Difference]: Finished difference Result 533 states and 533 transitions. [2018-04-12 11:01:50,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-04-12 11:01:50,852 INFO L78 Accepts]: Start accepts. Automaton has 211 states. Word has length 522 [2018-04-12 11:01:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:01:50,853 INFO L225 Difference]: With dead ends: 533 [2018-04-12 11:01:50,853 INFO L226 Difference]: Without dead ends: 533 [2018-04-12 11:01:50,854 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21423 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11235, Invalid=33075, Unknown=0, NotChecked=0, Total=44310 [2018-04-12 11:01:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2018-04-12 11:01:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2018-04-12 11:01:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2018-04-12 11:01:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 533 transitions. [2018-04-12 11:01:50,856 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 533 transitions. Word has length 522 [2018-04-12 11:01:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:01:50,857 INFO L459 AbstractCegarLoop]: Abstraction has 533 states and 533 transitions. [2018-04-12 11:01:50,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 211 states. [2018-04-12 11:01:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 533 transitions. [2018-04-12 11:01:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2018-04-12 11:01:50,858 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:01:50,858 INFO L355 BasicCegarLoop]: trace histogram [105, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-04-12 11:01:50,858 INFO L408 AbstractCegarLoop]: === Iteration 109 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:01:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash 736312230, now seen corresponding path program 104 times [2018-04-12 11:01:50,858 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:01:50,858 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:01:50,859 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:50,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:01:50,859 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:01:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:01:50,871 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:01:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26988 backedges. 0 proven. 26988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:53,092 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:01:53,092 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:01:53,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 11:01:53,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 11:01:53,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:01:53,155 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:01:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 26988 backedges. 0 proven. 26988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:01:56,081 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:01:56,095 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106] total 212 [2018-04-12 11:01:56,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 213 states [2018-04-12 11:01:56,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2018-04-12 11:01:56,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10706, Invalid=34450, Unknown=0, NotChecked=0, Total=45156 [2018-04-12 11:01:56,098 INFO L87 Difference]: Start difference. First operand 533 states and 533 transitions. Second operand 213 states. [2018-04-12 11:02:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:02:06,141 INFO L93 Difference]: Finished difference Result 538 states and 538 transitions. [2018-04-12 11:02:06,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-04-12 11:02:06,141 INFO L78 Accepts]: Start accepts. Automaton has 213 states. Word has length 527 [2018-04-12 11:02:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:02:06,142 INFO L225 Difference]: With dead ends: 538 [2018-04-12 11:02:06,142 INFO L226 Difference]: Without dead ends: 538 [2018-04-12 11:02:06,143 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21076 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10706, Invalid=34450, Unknown=0, NotChecked=0, Total=45156 [2018-04-12 11:02:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2018-04-12 11:02:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2018-04-12 11:02:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2018-04-12 11:02:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 538 transitions. [2018-04-12 11:02:06,145 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 538 transitions. Word has length 527 [2018-04-12 11:02:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:02:06,145 INFO L459 AbstractCegarLoop]: Abstraction has 538 states and 538 transitions. [2018-04-12 11:02:06,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 213 states. [2018-04-12 11:02:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 538 transitions. [2018-04-12 11:02:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-04-12 11:02:06,147 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:02:06,147 INFO L355 BasicCegarLoop]: trace histogram [106, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-04-12 11:02:06,147 INFO L408 AbstractCegarLoop]: === Iteration 110 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:02:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1772190441, now seen corresponding path program 105 times [2018-04-12 11:02:06,147 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:02:06,147 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:02:06,148 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:02:06,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:02:06,148 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:02:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:02:06,160 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:02:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27510 backedges. 0 proven. 27510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:02:08,521 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:02:08,521 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:02:08,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 11:02:15,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-04-12 11:02:15,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:02:15,561 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:02:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 27510 backedges. 0 proven. 27510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:02:15,708 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:02:15,709 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-04-12 11:02:15,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-12 11:02:15,709 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-12 11:02:15,710 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5676, Invalid=6096, Unknown=0, NotChecked=0, Total=11772 [2018-04-12 11:02:15,710 INFO L87 Difference]: Start difference. First operand 538 states and 538 transitions. Second operand 109 states. [2018-04-12 11:02:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:02:19,016 INFO L93 Difference]: Finished difference Result 543 states and 543 transitions. [2018-04-12 11:02:19,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-04-12 11:02:19,016 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 532 [2018-04-12 11:02:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:02:19,017 INFO L225 Difference]: With dead ends: 543 [2018-04-12 11:02:19,017 INFO L226 Difference]: Without dead ends: 543 [2018-04-12 11:02:19,019 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5669 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=17016, Invalid=28566, Unknown=0, NotChecked=0, Total=45582 [2018-04-12 11:02:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-04-12 11:02:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-04-12 11:02:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-04-12 11:02:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 543 transitions. [2018-04-12 11:02:19,021 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 543 transitions. Word has length 532 [2018-04-12 11:02:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:02:19,021 INFO L459 AbstractCegarLoop]: Abstraction has 543 states and 543 transitions. [2018-04-12 11:02:19,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-12 11:02:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 543 transitions. [2018-04-12 11:02:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2018-04-12 11:02:19,022 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:02:19,022 INFO L355 BasicCegarLoop]: trace histogram [107, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-04-12 11:02:19,022 INFO L408 AbstractCegarLoop]: === Iteration 111 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:02:19,022 INFO L82 PathProgramCache]: Analyzing trace with hash -748914106, now seen corresponding path program 106 times [2018-04-12 11:02:19,022 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:02:19,023 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:02:19,023 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:02:19,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:02:19,023 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:02:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:02:19,035 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:02:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 28037 backedges. 0 proven. 28037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:02:21,401 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:02:21,401 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:02:21,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 11:02:21,460 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 11:02:21,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:02:21,465 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:02:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28037 backedges. 0 proven. 28037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:02:24,285 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:02:24,285 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108] total 216 [2018-04-12 11:02:24,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 217 states [2018-04-12 11:02:24,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2018-04-12 11:02:24,287 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11772, Invalid=35100, Unknown=0, NotChecked=0, Total=46872 [2018-04-12 11:02:24,287 INFO L87 Difference]: Start difference. First operand 543 states and 543 transitions. Second operand 217 states. [2018-04-12 11:02:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:02:31,747 INFO L93 Difference]: Finished difference Result 548 states and 548 transitions. [2018-04-12 11:02:31,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-04-12 11:02:31,748 INFO L78 Accepts]: Start accepts. Automaton has 217 states. Word has length 537 [2018-04-12 11:02:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:02:31,748 INFO L225 Difference]: With dead ends: 548 [2018-04-12 11:02:31,748 INFO L226 Difference]: Without dead ends: 548 [2018-04-12 11:02:31,749 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22575 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11772, Invalid=35100, Unknown=0, NotChecked=0, Total=46872 [2018-04-12 11:02:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2018-04-12 11:02:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2018-04-12 11:02:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2018-04-12 11:02:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 548 transitions. [2018-04-12 11:02:31,752 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 548 transitions. Word has length 537 [2018-04-12 11:02:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:02:31,752 INFO L459 AbstractCegarLoop]: Abstraction has 548 states and 548 transitions. [2018-04-12 11:02:31,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 217 states. [2018-04-12 11:02:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 548 transitions. [2018-04-12 11:02:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-04-12 11:02:31,753 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:02:31,754 INFO L355 BasicCegarLoop]: trace histogram [108, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-04-12 11:02:31,754 INFO L408 AbstractCegarLoop]: === Iteration 112 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:02:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1878824329, now seen corresponding path program 107 times [2018-04-12 11:02:31,754 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:02:31,754 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:02:31,754 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:02:31,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:02:31,754 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:02:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:02:31,767 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:02:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 28569 backedges. 0 proven. 28569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:02:34,212 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:02:34,212 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:02:34,217 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 11:02:49,194 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-04-12 11:02:49,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:02:49,204 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:02:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28569 backedges. 0 proven. 28569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:02:52,508 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:02:52,508 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109] total 217 [2018-04-12 11:02:52,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-04-12 11:02:52,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-04-12 11:02:52,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11989, Invalid=35317, Unknown=0, NotChecked=0, Total=47306 [2018-04-12 11:02:52,511 INFO L87 Difference]: Start difference. First operand 548 states and 548 transitions. Second operand 218 states. [2018-04-12 11:03:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:03:05,890 INFO L93 Difference]: Finished difference Result 553 states and 553 transitions. [2018-04-12 11:03:05,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-04-12 11:03:05,890 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 542 [2018-04-12 11:03:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:03:05,891 INFO L225 Difference]: With dead ends: 553 [2018-04-12 11:03:05,891 INFO L226 Difference]: Without dead ends: 553 [2018-04-12 11:03:05,892 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22899 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12099, Invalid=35643, Unknown=0, NotChecked=0, Total=47742 [2018-04-12 11:03:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2018-04-12 11:03:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2018-04-12 11:03:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2018-04-12 11:03:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 553 transitions. [2018-04-12 11:03:05,894 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 553 transitions. Word has length 542 [2018-04-12 11:03:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:03:05,894 INFO L459 AbstractCegarLoop]: Abstraction has 553 states and 553 transitions. [2018-04-12 11:03:05,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-04-12 11:03:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 553 transitions. [2018-04-12 11:03:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-04-12 11:03:05,895 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:03:05,895 INFO L355 BasicCegarLoop]: trace histogram [109, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1] [2018-04-12 11:03:05,895 INFO L408 AbstractCegarLoop]: === Iteration 113 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:03:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1445990170, now seen corresponding path program 108 times [2018-04-12 11:03:05,896 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:03:05,896 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:03:05,896 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:05,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:03:05,896 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:03:05,909 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:03:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 29106 backedges. 0 proven. 29106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:08,309 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:03:08,309 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:03:08,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 11:03:11,621 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-04-12 11:03:11,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:03:11,628 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:03:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 29106 backedges. 0 proven. 29106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:11,952 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:03:11,952 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110] total 115 [2018-04-12 11:03:11,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-04-12 11:03:11,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-04-12 11:03:11,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6021, Invalid=7319, Unknown=0, NotChecked=0, Total=13340 [2018-04-12 11:03:11,953 INFO L87 Difference]: Start difference. First operand 553 states and 553 transitions. Second operand 116 states. [2018-04-12 11:03:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:03:16,290 INFO L93 Difference]: Finished difference Result 558 states and 558 transitions. [2018-04-12 11:03:16,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-04-12 11:03:16,290 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 547 [2018-04-12 11:03:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:03:16,291 INFO L225 Difference]: With dead ends: 558 [2018-04-12 11:03:16,291 INFO L226 Difference]: Without dead ends: 558 [2018-04-12 11:03:16,292 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=18110, Invalid=31842, Unknown=0, NotChecked=0, Total=49952 [2018-04-12 11:03:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2018-04-12 11:03:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2018-04-12 11:03:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2018-04-12 11:03:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 558 transitions. [2018-04-12 11:03:16,294 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 558 transitions. Word has length 547 [2018-04-12 11:03:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:03:16,294 INFO L459 AbstractCegarLoop]: Abstraction has 558 states and 558 transitions. [2018-04-12 11:03:16,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-04-12 11:03:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 558 transitions. [2018-04-12 11:03:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2018-04-12 11:03:16,296 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:03:16,296 INFO L355 BasicCegarLoop]: trace histogram [110, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1] [2018-04-12 11:03:16,296 INFO L408 AbstractCegarLoop]: === Iteration 114 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:03:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash 911284183, now seen corresponding path program 109 times [2018-04-12 11:03:16,296 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:03:16,296 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:03:16,296 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:16,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:03:16,297 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:03:16,310 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:03:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 29648 backedges. 0 proven. 29648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:18,780 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:03:18,780 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:03:18,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:03:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:03:18,859 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:03:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29648 backedges. 0 proven. 29648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:21,750 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:03:21,750 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111] total 222 [2018-04-12 11:03:21,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 223 states [2018-04-12 11:03:21,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2018-04-12 11:03:21,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12543, Invalid=36963, Unknown=0, NotChecked=0, Total=49506 [2018-04-12 11:03:21,753 INFO L87 Difference]: Start difference. First operand 558 states and 558 transitions. Second operand 223 states. [2018-04-12 11:03:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:03:32,065 INFO L93 Difference]: Finished difference Result 563 states and 563 transitions. [2018-04-12 11:03:32,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-04-12 11:03:32,065 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 552 [2018-04-12 11:03:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:03:32,066 INFO L225 Difference]: With dead ends: 563 [2018-04-12 11:03:32,066 INFO L226 Difference]: Without dead ends: 563 [2018-04-12 11:03:32,067 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23979 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12543, Invalid=36963, Unknown=0, NotChecked=0, Total=49506 [2018-04-12 11:03:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2018-04-12 11:03:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2018-04-12 11:03:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2018-04-12 11:03:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 563 transitions. [2018-04-12 11:03:32,069 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 563 transitions. Word has length 552 [2018-04-12 11:03:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:03:32,069 INFO L459 AbstractCegarLoop]: Abstraction has 563 states and 563 transitions. [2018-04-12 11:03:32,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 223 states. [2018-04-12 11:03:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 563 transitions. [2018-04-12 11:03:32,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2018-04-12 11:03:32,071 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:03:32,071 INFO L355 BasicCegarLoop]: trace histogram [111, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1] [2018-04-12 11:03:32,071 INFO L408 AbstractCegarLoop]: === Iteration 115 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:03:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash -975724666, now seen corresponding path program 110 times [2018-04-12 11:03:32,071 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:03:32,071 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:03:32,071 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:32,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:03:32,071 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:03:32,085 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:03:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30195 backedges. 0 proven. 30195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:34,648 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:03:34,648 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:03:34,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 11:03:34,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 11:03:34,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:03:34,714 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:03:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30195 backedges. 0 proven. 30195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:37,686 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:03:37,686 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112] total 224 [2018-04-12 11:03:37,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 225 states [2018-04-12 11:03:37,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2018-04-12 11:03:37,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12656, Invalid=37744, Unknown=0, NotChecked=0, Total=50400 [2018-04-12 11:03:37,689 INFO L87 Difference]: Start difference. First operand 563 states and 563 transitions. Second operand 225 states. [2018-04-12 11:03:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:03:47,538 INFO L93 Difference]: Finished difference Result 568 states and 568 transitions. [2018-04-12 11:03:47,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-04-12 11:03:47,538 INFO L78 Accepts]: Start accepts. Automaton has 225 states. Word has length 557 [2018-04-12 11:03:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:03:47,539 INFO L225 Difference]: With dead ends: 568 [2018-04-12 11:03:47,539 INFO L226 Difference]: Without dead ends: 568 [2018-04-12 11:03:47,540 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24307 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12656, Invalid=37744, Unknown=0, NotChecked=0, Total=50400 [2018-04-12 11:03:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2018-04-12 11:03:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2018-04-12 11:03:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-04-12 11:03:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 568 transitions. [2018-04-12 11:03:47,542 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 568 transitions. Word has length 557 [2018-04-12 11:03:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:03:47,542 INFO L459 AbstractCegarLoop]: Abstraction has 568 states and 568 transitions. [2018-04-12 11:03:47,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 225 states. [2018-04-12 11:03:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 568 transitions. [2018-04-12 11:03:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-04-12 11:03:47,544 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:03:47,544 INFO L355 BasicCegarLoop]: trace histogram [112, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1] [2018-04-12 11:03:47,544 INFO L408 AbstractCegarLoop]: === Iteration 116 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:03:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2098361033, now seen corresponding path program 111 times [2018-04-12 11:03:47,544 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:03:47,544 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:03:47,545 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:47,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:03:47,545 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:03:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:03:47,558 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:03:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30747 backedges. 0 proven. 30747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:50,122 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:03:50,122 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:03:50,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 11:03:59,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-04-12 11:03:59,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:03:59,263 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:03:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30747 backedges. 0 proven. 30747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:03:59,432 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:03:59,433 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-04-12 11:03:59,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-04-12 11:03:59,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-04-12 11:03:59,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6333, Invalid=6777, Unknown=0, NotChecked=0, Total=13110 [2018-04-12 11:03:59,434 INFO L87 Difference]: Start difference. First operand 568 states and 568 transitions. Second operand 115 states. [2018-04-12 11:04:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:04:03,307 INFO L93 Difference]: Finished difference Result 573 states and 573 transitions. [2018-04-12 11:04:03,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-04-12 11:04:03,307 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 562 [2018-04-12 11:04:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:04:03,308 INFO L225 Difference]: With dead ends: 573 [2018-04-12 11:04:03,308 INFO L226 Difference]: Without dead ends: 573 [2018-04-12 11:04:03,309 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=18987, Invalid=31863, Unknown=0, NotChecked=0, Total=50850 [2018-04-12 11:04:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2018-04-12 11:04:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2018-04-12 11:04:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2018-04-12 11:04:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 573 transitions. [2018-04-12 11:04:03,312 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 573 transitions. Word has length 562 [2018-04-12 11:04:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:04:03,312 INFO L459 AbstractCegarLoop]: Abstraction has 573 states and 573 transitions. [2018-04-12 11:04:03,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-04-12 11:04:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 573 transitions. [2018-04-12 11:04:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-04-12 11:04:03,313 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:04:03,313 INFO L355 BasicCegarLoop]: trace histogram [113, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1] [2018-04-12 11:04:03,313 INFO L408 AbstractCegarLoop]: === Iteration 117 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:04:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1166902822, now seen corresponding path program 112 times [2018-04-12 11:04:03,314 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:04:03,314 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:04:03,314 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:04:03,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:04:03,314 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:04:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:04:03,328 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:04:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 31304 backedges. 0 proven. 31304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:04:05,791 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:04:05,791 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:04:05,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 11:04:05,848 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 11:04:05,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:04:05,854 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:04:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31304 backedges. 0 proven. 31304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:04:09,547 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:04:09,547 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114] total 228 [2018-04-12 11:04:09,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 229 states [2018-04-12 11:04:09,549 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2018-04-12 11:04:09,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11514, Invalid=40698, Unknown=0, NotChecked=0, Total=52212 [2018-04-12 11:04:09,550 INFO L87 Difference]: Start difference. First operand 573 states and 573 transitions. Second operand 229 states. [2018-04-12 11:04:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:04:20,265 INFO L93 Difference]: Finished difference Result 578 states and 578 transitions. [2018-04-12 11:04:20,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-04-12 11:04:20,265 INFO L78 Accepts]: Start accepts. Automaton has 229 states. Word has length 567 [2018-04-12 11:04:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:04:20,265 INFO L225 Difference]: With dead ends: 578 [2018-04-12 11:04:20,265 INFO L226 Difference]: Without dead ends: 578 [2018-04-12 11:04:20,267 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23496 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=11514, Invalid=40698, Unknown=0, NotChecked=0, Total=52212 [2018-04-12 11:04:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2018-04-12 11:04:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2018-04-12 11:04:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2018-04-12 11:04:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 578 transitions. [2018-04-12 11:04:20,269 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 578 transitions. Word has length 567 [2018-04-12 11:04:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:04:20,269 INFO L459 AbstractCegarLoop]: Abstraction has 578 states and 578 transitions. [2018-04-12 11:04:20,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 229 states. [2018-04-12 11:04:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 578 transitions. [2018-04-12 11:04:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-04-12 11:04:20,270 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:04:20,271 INFO L355 BasicCegarLoop]: trace histogram [114, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1] [2018-04-12 11:04:20,271 INFO L408 AbstractCegarLoop]: === Iteration 118 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:04:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash 402573975, now seen corresponding path program 113 times [2018-04-12 11:04:20,271 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:04:20,271 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:04:20,271 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:04:20,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:04:20,271 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:04:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:04:20,286 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:04:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31866 backedges. 0 proven. 31866 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:04:22,886 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:04:22,886 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:04:22,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-12 11:04:41,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-04-12 11:04:41,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:04:41,098 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:04:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31866 backedges. 0 proven. 31866 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:04:44,741 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:04:44,741 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115] total 229 [2018-04-12 11:04:44,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-04-12 11:04:44,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-04-12 11:04:44,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13339, Invalid=39331, Unknown=0, NotChecked=0, Total=52670 [2018-04-12 11:04:44,743 INFO L87 Difference]: Start difference. First operand 578 states and 578 transitions. Second operand 230 states. [2018-04-12 11:04:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:04:57,814 INFO L93 Difference]: Finished difference Result 583 states and 583 transitions. [2018-04-12 11:04:57,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-04-12 11:04:57,814 INFO L78 Accepts]: Start accepts. Automaton has 230 states. Word has length 572 [2018-04-12 11:04:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:04:57,815 INFO L225 Difference]: With dead ends: 583 [2018-04-12 11:04:57,815 INFO L226 Difference]: Without dead ends: 583 [2018-04-12 11:04:57,816 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25539 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13455, Invalid=39675, Unknown=0, NotChecked=0, Total=53130 [2018-04-12 11:04:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2018-04-12 11:04:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2018-04-12 11:04:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2018-04-12 11:04:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 583 transitions. [2018-04-12 11:04:57,818 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 583 transitions. Word has length 572 [2018-04-12 11:04:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:04:57,819 INFO L459 AbstractCegarLoop]: Abstraction has 583 states and 583 transitions. [2018-04-12 11:04:57,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 230 states. [2018-04-12 11:04:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 583 transitions. [2018-04-12 11:04:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2018-04-12 11:04:57,820 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:04:57,820 INFO L355 BasicCegarLoop]: trace histogram [115, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1] [2018-04-12 11:04:57,820 INFO L408 AbstractCegarLoop]: === Iteration 119 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:04:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash -292838202, now seen corresponding path program 114 times [2018-04-12 11:04:57,820 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:04:57,820 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:04:57,821 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:04:57,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:04:57,821 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:04:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:04:57,834 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:05:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32433 backedges. 0 proven. 32433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:00,502 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:05:00,503 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:05:00,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-12 11:05:04,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-04-12 11:05:04,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:05:04,885 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:05:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32433 backedges. 0 proven. 32433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:05,171 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:05:05,171 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 120 [2018-04-12 11:05:05,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-04-12 11:05:05,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-04-12 11:05:05,172 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6688, Invalid=7832, Unknown=0, NotChecked=0, Total=14520 [2018-04-12 11:05:05,172 INFO L87 Difference]: Start difference. First operand 583 states and 583 transitions. Second operand 121 states. [2018-04-12 11:05:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:05:09,349 INFO L93 Difference]: Finished difference Result 588 states and 588 transitions. [2018-04-12 11:05:09,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-04-12 11:05:09,349 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 577 [2018-04-12 11:05:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:05:09,350 INFO L225 Difference]: With dead ends: 588 [2018-04-12 11:05:09,350 INFO L226 Difference]: Without dead ends: 588 [2018-04-12 11:05:09,352 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7012 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20252, Invalid=34738, Unknown=0, NotChecked=0, Total=54990 [2018-04-12 11:05:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2018-04-12 11:05:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2018-04-12 11:05:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2018-04-12 11:05:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 588 transitions. [2018-04-12 11:05:09,356 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 588 transitions. Word has length 577 [2018-04-12 11:05:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:05:09,357 INFO L459 AbstractCegarLoop]: Abstraction has 588 states and 588 transitions. [2018-04-12 11:05:09,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-04-12 11:05:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 588 transitions. [2018-04-12 11:05:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-04-12 11:05:09,359 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:05:09,359 INFO L355 BasicCegarLoop]: trace histogram [116, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1] [2018-04-12 11:05:09,360 INFO L408 AbstractCegarLoop]: === Iteration 120 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:05:09,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1607806985, now seen corresponding path program 115 times [2018-04-12 11:05:09,360 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:05:09,360 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:05:09,360 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:09,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:05:09,361 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:05:09,386 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:05:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 33005 backedges. 0 proven. 33005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:12,166 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:05:12,166 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:05:12,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:05:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:05:12,236 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:05:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33005 backedges. 0 proven. 33005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:15,430 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:05:15,430 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117] total 234 [2018-04-12 11:05:15,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 235 states [2018-04-12 11:05:15,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2018-04-12 11:05:15,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13923, Invalid=41067, Unknown=0, NotChecked=0, Total=54990 [2018-04-12 11:05:15,433 INFO L87 Difference]: Start difference. First operand 588 states and 588 transitions. Second operand 235 states. [2018-04-12 11:05:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:05:23,299 INFO L93 Difference]: Finished difference Result 593 states and 593 transitions. [2018-04-12 11:05:23,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-04-12 11:05:23,299 INFO L78 Accepts]: Start accepts. Automaton has 235 states. Word has length 582 [2018-04-12 11:05:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:05:23,300 INFO L225 Difference]: With dead ends: 593 [2018-04-12 11:05:23,300 INFO L226 Difference]: Without dead ends: 593 [2018-04-12 11:05:23,301 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26679 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13923, Invalid=41067, Unknown=0, NotChecked=0, Total=54990 [2018-04-12 11:05:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-04-12 11:05:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2018-04-12 11:05:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2018-04-12 11:05:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 593 transitions. [2018-04-12 11:05:23,303 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 593 transitions. Word has length 582 [2018-04-12 11:05:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:05:23,304 INFO L459 AbstractCegarLoop]: Abstraction has 593 states and 593 transitions. [2018-04-12 11:05:23,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 235 states. [2018-04-12 11:05:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 593 transitions. [2018-04-12 11:05:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2018-04-12 11:05:23,305 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:05:23,305 INFO L355 BasicCegarLoop]: trace histogram [117, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1] [2018-04-12 11:05:23,305 INFO L408 AbstractCegarLoop]: === Iteration 121 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:05:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash -840172698, now seen corresponding path program 116 times [2018-04-12 11:05:23,305 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:05:23,306 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:05:23,306 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:23,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 11:05:23,306 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:05:23,320 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:05:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 33582 backedges. 0 proven. 33582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:26,091 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:05:26,091 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:05:26,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 11:05:26,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 11:05:26,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:05:26,158 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:05:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 33582 backedges. 0 proven. 33582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:29,520 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:05:29,520 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118] total 236 [2018-04-12 11:05:29,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 237 states [2018-04-12 11:05:29,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 237 interpolants. [2018-04-12 11:05:29,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13806, Invalid=42126, Unknown=0, NotChecked=0, Total=55932 [2018-04-12 11:05:29,523 INFO L87 Difference]: Start difference. First operand 593 states and 593 transitions. Second operand 237 states. [2018-04-12 11:05:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:05:38,908 INFO L93 Difference]: Finished difference Result 598 states and 598 transitions. [2018-04-12 11:05:38,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-04-12 11:05:38,908 INFO L78 Accepts]: Start accepts. Automaton has 237 states. Word has length 587 [2018-04-12 11:05:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:05:38,909 INFO L225 Difference]: With dead ends: 598 [2018-04-12 11:05:38,909 INFO L226 Difference]: Without dead ends: 598 [2018-04-12 11:05:38,910 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26786 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13806, Invalid=42126, Unknown=0, NotChecked=0, Total=55932 [2018-04-12 11:05:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2018-04-12 11:05:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2018-04-12 11:05:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2018-04-12 11:05:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 598 transitions. [2018-04-12 11:05:38,912 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 598 transitions. Word has length 587 [2018-04-12 11:05:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:05:38,913 INFO L459 AbstractCegarLoop]: Abstraction has 598 states and 598 transitions. [2018-04-12 11:05:38,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 237 states. [2018-04-12 11:05:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 598 transitions. [2018-04-12 11:05:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-04-12 11:05:38,914 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:05:38,914 INFO L355 BasicCegarLoop]: trace histogram [118, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1] [2018-04-12 11:05:38,914 INFO L408 AbstractCegarLoop]: === Iteration 122 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:05:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash 781688151, now seen corresponding path program 117 times [2018-04-12 11:05:38,915 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:05:38,915 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:05:38,915 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:38,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:05:38,915 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:05:38,929 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:05:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 34164 backedges. 0 proven. 34164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:41,786 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:05:41,786 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:05:41,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 11:05:52,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-04-12 11:05:52,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:05:52,675 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:05:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34164 backedges. 0 proven. 34164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:52,861 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:05:52,861 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-04-12 11:05:52,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-04-12 11:05:52,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-04-12 11:05:52,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7026, Invalid=7494, Unknown=0, NotChecked=0, Total=14520 [2018-04-12 11:05:52,863 INFO L87 Difference]: Start difference. First operand 598 states and 598 transitions. Second operand 121 states. [2018-04-12 11:05:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 11:05:56,886 INFO L93 Difference]: Finished difference Result 603 states and 603 transitions. [2018-04-12 11:05:56,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-04-12 11:05:56,886 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 592 [2018-04-12 11:05:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 11:05:56,887 INFO L225 Difference]: With dead ends: 603 [2018-04-12 11:05:56,888 INFO L226 Difference]: Without dead ends: 603 [2018-04-12 11:05:56,890 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7019 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=21066, Invalid=35340, Unknown=0, NotChecked=0, Total=56406 [2018-04-12 11:05:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-04-12 11:05:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2018-04-12 11:05:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2018-04-12 11:05:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 603 transitions. [2018-04-12 11:05:56,894 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 603 transitions. Word has length 592 [2018-04-12 11:05:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 11:05:56,895 INFO L459 AbstractCegarLoop]: Abstraction has 603 states and 603 transitions. [2018-04-12 11:05:56,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-04-12 11:05:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 603 transitions. [2018-04-12 11:05:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-04-12 11:05:56,897 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 11:05:56,898 INFO L355 BasicCegarLoop]: trace histogram [119, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1] [2018-04-12 11:05:56,898 INFO L408 AbstractCegarLoop]: === Iteration 123 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-12 11:05:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash -666334714, now seen corresponding path program 118 times [2018-04-12 11:05:56,898 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 11:05:56,898 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 11:05:56,899 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:56,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 11:05:56,899 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 11:05:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 11:05:56,925 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 11:05:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34751 backedges. 0 proven. 34751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:05:59,862 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 11:05:59,863 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 11:05:59,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-12 11:05:59,925 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-12 11:05:59,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 11:05:59,931 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 11:06:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34751 backedges. 0 proven. 34751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 11:06:03,593 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 11:06:03,593 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 120] total 240 [2018-04-12 11:06:03,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 241 states [2018-04-12 11:06:03,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 241 interpolants. [2018-04-12 11:06:03,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14520, Invalid=43320, Unknown=0, NotChecked=0, Total=57840 [2018-04-12 11:06:03,596 INFO L87 Difference]: Start difference. First operand 603 states and 603 transitions. Second operand 241 states. Received shutdown request... [2018-04-12 11:06:04,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-12 11:06:04,011 WARN L519 AbstractCegarLoop]: Verification canceled [2018-04-12 11:06:04,015 WARN L197 ceAbstractionStarter]: Timeout [2018-04-12 11:06:04,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.04 11:06:04 BoogieIcfgContainer [2018-04-12 11:06:04,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-12 11:06:04,016 INFO L168 Benchmark]: Toolchain (without parser) took 762884.57 ms. Allocated memory was 405.3 MB in the beginning and 1.2 GB in the end (delta: 760.7 MB). Free memory was 349.0 MB in the beginning and 656.8 MB in the end (delta: -307.8 MB). Peak memory consumption was 453.0 MB. Max. memory is 5.3 GB. [2018-04-12 11:06:04,016 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 405.3 MB. Free memory is still 368.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-12 11:06:04,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.00 ms. Allocated memory is still 405.3 MB. Free memory was 349.0 MB in the beginning and 339.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 5.3 GB. [2018-04-12 11:06:04,017 INFO L168 Benchmark]: Boogie Preprocessor took 20.07 ms. Allocated memory is still 405.3 MB. Free memory was 339.8 MB in the beginning and 338.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-04-12 11:06:04,017 INFO L168 Benchmark]: RCFGBuilder took 173.83 ms. Allocated memory was 405.3 MB in the beginning and 616.0 MB in the end (delta: 210.8 MB). Free memory was 338.5 MB in the beginning and 583.9 MB in the end (delta: -245.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 5.3 GB. [2018-04-12 11:06:04,017 INFO L168 Benchmark]: TraceAbstraction took 762537.77 ms. Allocated memory was 616.0 MB in the beginning and 1.2 GB in the end (delta: 550.0 MB). Free memory was 583.9 MB in the beginning and 656.8 MB in the end (delta: -73.0 MB). Peak memory consumption was 477.0 MB. Max. memory is 5.3 GB. [2018-04-12 11:06:04,018 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 405.3 MB. Free memory is still 368.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 150.00 ms. Allocated memory is still 405.3 MB. Free memory was 349.0 MB in the beginning and 339.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 20.07 ms. Allocated memory is still 405.3 MB. Free memory was 339.8 MB in the beginning and 338.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 173.83 ms. Allocated memory was 405.3 MB in the beginning and 616.0 MB in the end (delta: 210.8 MB). Free memory was 338.5 MB in the beginning and 583.9 MB in the end (delta: -245.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 762537.77 ms. Allocated memory was 616.0 MB in the beginning and 1.2 GB in the end (delta: 550.0 MB). Free memory was 583.9 MB in the beginning and 656.8 MB in the end (delta: -73.0 MB). Peak memory consumption was 477.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was constructing difference of abstraction (603states) and interpolant automaton (currently 8 states, 241 states before enhancement), while ReachableStatesComputation was computing reachable states (33 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was constructing difference of abstraction (603states) and interpolant automaton (currently 8 states, 241 states before enhancement), while ReachableStatesComputation was computing reachable states (33 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was constructing difference of abstraction (603states) and interpolant automaton (currently 8 states, 241 states before enhancement), while ReachableStatesComputation was computing reachable states (33 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was constructing difference of abstraction (603states) and interpolant automaton (currently 8 states, 241 states before enhancement), while ReachableStatesComputation was computing reachable states (33 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 7). Cancelled while BasicCegarLoop was constructing difference of abstraction (603states) and interpolant automaton (currently 8 states, 241 states before enhancement), while ReachableStatesComputation was computing reachable states (33 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 5 error locations. TIMEOUT Result, 762.5s OverallTime, 123 OverallIterations, 119 TraceHistogramMax, 381.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5939 SDtfs, 48319 SDslu, 382623 SDs, 0 SdLazy, 1480720 SolverSat, 7693 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 249.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45636 GetRequests, 31273 SyntacticMatches, 9 SemanticMatches, 14354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829755 ImplicationChecksByTransitivity, 270.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=603occurred in iteration=122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 122 MinimizatonAttempts, 139 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 148.5s SatisfiabilityAnalysisTime, 221.4s InterpolantComputationTime, 72033 NumberOfCodeBlocks, 72033 NumberOfCodeBlocksAsserted, 3746 NumberOfCheckSat, 71789 ConstructedInterpolants, 0 QuantifiedInterpolants, 97369473 SizeOfPredicates, 3 NumberOfNonLiveVariables, 79027 ConjunctsInSsa, 12108 ConjunctsInUnsatCore, 244 InterpolantComputations, 3 PerfectInterpolantSequences, 33/2766320 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-04-12_11-06-04-022.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-04-12_11-06-04-022.csv Completed graceful shutdown