java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:14:17,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:14:17,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:14:17,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:14:17,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:14:17,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:14:17,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:14:17,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:14:17,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:14:17,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:14:17,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:14:17,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:14:17,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:14:17,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:14:17,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:14:17,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:14:17,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:14:17,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:14:17,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:14:17,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:14:17,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:14:17,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:14:17,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:14:17,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:14:17,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-16 16:14:17,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-16 16:14:17,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-16 16:14:17,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-16 16:14:17,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-16 16:14:17,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-16 16:14:17,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:14:17,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:14:17,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:14:17,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:14:17,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:14:17,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:14:17,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:14:17,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:14:17,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:14:17,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:14:17,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:14:17,126 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-16 16:14:17,149 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:14:17,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:14:17,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:14:17,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:14:17,151 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:14:17,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:14:17,151 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:14:17,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:14:17,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:14:17,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:14:17,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:14:17,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:14:17,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:14:17,155 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:14:17,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:14:17,155 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:14:17,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:14:17,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:14:17,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:14:17,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:14:17,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:14:17,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:14:17,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:14:17,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:14:17,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:14:17,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:14:17,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:14:17,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:14:17,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:14:17,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:14:17,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:14:17,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:14:17,210 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:14:17,210 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:14:17,213 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2019-09-16 16:14:17,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ad0202f/6c9076ec92c946e7967d19fc2590fbce/FLAG4239053ba [2019-09-16 16:14:17,746 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:14:17,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr5.c [2019-09-16 16:14:17,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ad0202f/6c9076ec92c946e7967d19fc2590fbce/FLAG4239053ba [2019-09-16 16:14:18,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ad0202f/6c9076ec92c946e7967d19fc2590fbce [2019-09-16 16:14:18,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:14:18,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:14:18,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:18,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:14:18,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:14:18,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f676bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18, skipping insertion in model container [2019-09-16 16:14:18,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,124 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:14:18,146 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:14:18,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:18,353 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:14:18,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:18,522 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:14:18,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18 WrapperNode [2019-09-16 16:14:18,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:18,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:14:18,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:14:18,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:14:18,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... [2019-09-16 16:14:18,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:14:18,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:14:18,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:14:18,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:14:18,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:14:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:14:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:14:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:14:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:14:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:14:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 16:14:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:14:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 16:14:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:14:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 16:14:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:14:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:14:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:14:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:14:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:14:19,079 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:14:19,080 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-16 16:14:19,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:19 BoogieIcfgContainer [2019-09-16 16:14:19,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:14:19,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:14:19,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:14:19,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:14:19,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:14:18" (1/3) ... [2019-09-16 16:14:19,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472385f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:14:19, skipping insertion in model container [2019-09-16 16:14:19,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:18" (2/3) ... [2019-09-16 16:14:19,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472385f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:14:19, skipping insertion in model container [2019-09-16 16:14:19,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:19" (3/3) ... [2019-09-16 16:14:19,087 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2019-09-16 16:14:19,095 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:14:19,104 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:14:19,121 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:14:19,151 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:14:19,151 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:14:19,152 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:14:19,152 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:14:19,152 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:14:19,152 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:14:19,152 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:14:19,152 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:14:19,152 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:14:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-09-16 16:14:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 16:14:19,177 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:19,177 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:19,179 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064678, now seen corresponding path program 1 times [2019-09-16 16:14:19,186 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:19,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:19,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:19,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:19,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:19,361 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:19,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:14:19,365 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:14:19,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:14:19,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:14:19,379 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2019-09-16 16:14:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:19,402 INFO L93 Difference]: Finished difference Result 88 states and 124 transitions. [2019-09-16 16:14:19,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:14:19,403 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2019-09-16 16:14:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:19,412 INFO L225 Difference]: With dead ends: 88 [2019-09-16 16:14:19,412 INFO L226 Difference]: Without dead ends: 44 [2019-09-16 16:14:19,415 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:14:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-16 16:14:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-16 16:14:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-16 16:14:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-09-16 16:14:19,457 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 24 [2019-09-16 16:14:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:19,458 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-09-16 16:14:19,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:14:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-09-16 16:14:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 16:14:19,460 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:19,460 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:19,461 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash 625586285, now seen corresponding path program 1 times [2019-09-16 16:14:19,461 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:19,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:19,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:19,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:19,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:19,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:19,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:14:19,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:14:19,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:14:19,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:14:19,586 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2019-09-16 16:14:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:19,660 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-09-16 16:14:19,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:14:19,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-16 16:14:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:19,662 INFO L225 Difference]: With dead ends: 52 [2019-09-16 16:14:19,662 INFO L226 Difference]: Without dead ends: 50 [2019-09-16 16:14:19,665 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:14:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-16 16:14:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-09-16 16:14:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-16 16:14:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2019-09-16 16:14:19,681 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 24 [2019-09-16 16:14:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:19,682 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2019-09-16 16:14:19,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:14:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2019-09-16 16:14:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 16:14:19,684 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:19,685 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:19,685 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash 627433327, now seen corresponding path program 1 times [2019-09-16 16:14:19,685 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:19,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:19,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:19,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:19,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:19,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:19,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 16:14:19,914 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 16:14:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 16:14:19,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:14:19,915 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 4 states. [2019-09-16 16:14:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:20,072 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2019-09-16 16:14:20,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:14:20,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-09-16 16:14:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:20,076 INFO L225 Difference]: With dead ends: 90 [2019-09-16 16:14:20,077 INFO L226 Difference]: Without dead ends: 53 [2019-09-16 16:14:20,078 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:14:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-16 16:14:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-09-16 16:14:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-16 16:14:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-09-16 16:14:20,087 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 24 [2019-09-16 16:14:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:20,087 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-09-16 16:14:20,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 16:14:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-09-16 16:14:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-16 16:14:20,089 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:20,089 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:20,089 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 506953876, now seen corresponding path program 1 times [2019-09-16 16:14:20,090 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:20,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:20,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:20,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:20,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:20,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:20,256 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-09-16 16:14:20,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:20,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-16 16:14:20,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:20,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:20,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:20,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-09-16 16:14:20,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 16:14:20,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 16:14:20,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:14:20,419 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 8 states. [2019-09-16 16:14:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:20,627 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2019-09-16 16:14:20,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:14:20,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-16 16:14:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:20,630 INFO L225 Difference]: With dead ends: 107 [2019-09-16 16:14:20,630 INFO L226 Difference]: Without dead ends: 75 [2019-09-16 16:14:20,631 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-09-16 16:14:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-16 16:14:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2019-09-16 16:14:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-16 16:14:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-09-16 16:14:20,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 28 [2019-09-16 16:14:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:20,645 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-09-16 16:14:20,645 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 16:14:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-09-16 16:14:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-16 16:14:20,646 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:20,647 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:20,647 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -81151448, now seen corresponding path program 1 times [2019-09-16 16:14:20,647 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:20,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:20,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-16 16:14:20,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:20,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:14:20,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:14:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:14:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:14:20,726 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 3 states. [2019-09-16 16:14:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:20,759 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2019-09-16 16:14:20,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:14:20,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2019-09-16 16:14:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:20,761 INFO L225 Difference]: With dead ends: 75 [2019-09-16 16:14:20,761 INFO L226 Difference]: Without dead ends: 54 [2019-09-16 16:14:20,764 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:14:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-16 16:14:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-16 16:14:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-16 16:14:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-09-16 16:14:20,779 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 44 [2019-09-16 16:14:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:20,780 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-09-16 16:14:20,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:14:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-09-16 16:14:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-16 16:14:20,784 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:20,784 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:20,785 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash 619913130, now seen corresponding path program 1 times [2019-09-16 16:14:20,785 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:20,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:20,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:20,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:20,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:22,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:22,520 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2019-09-16 16:14:22,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:22,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-16 16:14:22,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:22,667 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-09-16 16:14:22,667 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:14:22,677 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:14:22,678 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-16 16:14:22,678 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-09-16 16:14:22,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:22,915 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:461) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-16 16:14:22,922 INFO L168 Benchmark]: Toolchain (without parser) took 4813.05 ms. Allocated memory was 133.7 MB in the beginning and 259.5 MB in the end (delta: 125.8 MB). Free memory was 88.3 MB in the beginning and 190.3 MB in the end (delta: -102.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:22,923 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 133.7 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 16:14:22,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.58 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 88.1 MB in the beginning and 175.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:22,925 INFO L168 Benchmark]: Boogie Preprocessor took 50.99 ms. Allocated memory is still 200.3 MB. Free memory was 175.2 MB in the beginning and 172.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:22,926 INFO L168 Benchmark]: RCFGBuilder took 505.75 ms. Allocated memory is still 200.3 MB. Free memory was 172.8 MB in the beginning and 148.8 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:22,927 INFO L168 Benchmark]: TraceAbstraction took 3838.61 ms. Allocated memory was 200.3 MB in the beginning and 259.5 MB in the end (delta: 59.2 MB). Free memory was 148.2 MB in the beginning and 190.3 MB in the end (delta: -42.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:22,931 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 133.7 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 413.58 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 88.1 MB in the beginning and 175.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.99 ms. Allocated memory is still 200.3 MB. Free memory was 175.2 MB in the beginning and 172.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 505.75 ms. Allocated memory is still 200.3 MB. Free memory was 172.8 MB in the beginning and 148.8 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3838.61 ms. Allocated memory was 200.3 MB in the beginning and 259.5 MB in the end (delta: 59.2 MB). Free memory was 148.2 MB in the beginning and 190.3 MB in the end (delta: -42.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...