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/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:14:14,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:14:14,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:14:14,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:14:14,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:14:14,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:14:14,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:14:14,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:14:14,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:14:14,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:14:14,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:14:14,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:14:14,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:14:14,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:14:14,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:14:14,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:14:14,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:14:14,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:14:14,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:14:14,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:14:14,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:14:14,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:14:14,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:14:14,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:14:14,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:14:14,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:14:14,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:14:14,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:14:14,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:14:14,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:14:14,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:14:14,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:14:14,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:14:14,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:14:14,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:14:14,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:14:14,663 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 16:14:14,678 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:14:14,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:14:14,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:14:14,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:14:14,680 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:14:14,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:14:14,681 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:14:14,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:14:14,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:14:14,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:14:14,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:14:14,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:14:14,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:14:14,682 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:14:14,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:14:14,682 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:14:14,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:14:14,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:14:14,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:14:14,683 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:14:14,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:14:14,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:14:14,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:14:14,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:14:14,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:14:14,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:14:14,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:14:14,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:14:14,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:14:14,727 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:14:14,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:14:14,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:14:14,747 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:14:14,747 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:14:14,748 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2019-09-16 16:14:14,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6819e1c4/6beb998a5a054c69b16d56d1b94c3944/FLAGdc17a521e [2019-09-16 16:14:15,278 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:14:15,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c [2019-09-16 16:14:15,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6819e1c4/6beb998a5a054c69b16d56d1b94c3944/FLAGdc17a521e [2019-09-16 16:14:15,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6819e1c4/6beb998a5a054c69b16d56d1b94c3944 [2019-09-16 16:14:15,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:14:15,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:14:15,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:15,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:14:15,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:14:15,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:15" (1/1) ... [2019-09-16 16:14:15,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d061354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:15, skipping insertion in model container [2019-09-16 16:14:15,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:15" (1/1) ... [2019-09-16 16:14:15,667 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:14:15,685 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:14:15,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:15,890 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:14:16,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:16,038 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:14:16,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16 WrapperNode [2019-09-16 16:14:16,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:16,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:14:16,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:14:16,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:14:16,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (1/1) ... [2019-09-16 16:14:16,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:14:16,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:14:16,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:14:16,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:14:16,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (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 16:14:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:14:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:14:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:14:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:14:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:14:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 16:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 16:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 16:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:14:16,560 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:14:16,560 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-16 16:14:16,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:16 BoogieIcfgContainer [2019-09-16 16:14:16,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:14:16,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:14:16,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:14:16,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:14:16,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:14:15" (1/3) ... [2019-09-16 16:14:16,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bcf10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:14:16, skipping insertion in model container [2019-09-16 16:14:16,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:16" (2/3) ... [2019-09-16 16:14:16,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bcf10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:14:16, skipping insertion in model container [2019-09-16 16:14:16,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:16" (3/3) ... [2019-09-16 16:14:16,570 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-09-16 16:14:16,579 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:14:16,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:14:16,610 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:14:16,645 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:14:16,645 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:14:16,645 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:14:16,645 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:14:16,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:14:16,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:14:16,646 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:14:16,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:14:16,646 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:14:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-09-16 16:14:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:14:16,666 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:16,667 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] [2019-09-16 16:14:16,669 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1961398023, now seen corresponding path program 1 times [2019-09-16 16:14:16,675 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:16,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:16,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:16,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:16,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:16,846 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 16:14:16,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:16,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:14:16,853 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:14:16,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:14:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:14:16,871 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-09-16 16:14:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:16,900 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2019-09-16 16:14:16,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:14:16,902 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-09-16 16:14:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:16,911 INFO L225 Difference]: With dead ends: 78 [2019-09-16 16:14:16,911 INFO L226 Difference]: Without dead ends: 39 [2019-09-16 16:14:16,915 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 16:14:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-16 16:14:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-16 16:14:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-16 16:14:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-09-16 16:14:16,961 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 22 [2019-09-16 16:14:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:16,962 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-09-16 16:14:16,962 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:14:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-09-16 16:14:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:14:16,966 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:16,967 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] [2019-09-16 16:14:16,967 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1084797805, now seen corresponding path program 1 times [2019-09-16 16:14:16,969 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:16,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:16,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:16,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:16,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:17,113 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 16:14:17,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:17,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:14:17,115 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:14:17,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:14:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:14:17,116 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 5 states. [2019-09-16 16:14:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:17,170 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-09-16 16:14:17,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:14:17,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-09-16 16:14:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:17,172 INFO L225 Difference]: With dead ends: 47 [2019-09-16 16:14:17,173 INFO L226 Difference]: Without dead ends: 45 [2019-09-16 16:14:17,174 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 16:14:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-16 16:14:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-09-16 16:14:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-16 16:14:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-16 16:14:17,183 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2019-09-16 16:14:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:17,183 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-16 16:14:17,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:14:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-16 16:14:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:14:17,185 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:17,185 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] [2019-09-16 16:14:17,185 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1082950763, now seen corresponding path program 1 times [2019-09-16 16:14:17,186 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:17,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:17,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:17,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:17,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:17,402 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 16:14:17,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:17,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 16:14:17,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 16:14:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 16:14:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:14:17,404 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-09-16 16:14:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:17,538 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-09-16 16:14:17,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:14:17,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-09-16 16:14:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:17,543 INFO L225 Difference]: With dead ends: 80 [2019-09-16 16:14:17,543 INFO L226 Difference]: Without dead ends: 48 [2019-09-16 16:14:17,544 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:14:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-16 16:14:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-09-16 16:14:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-16 16:14:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2019-09-16 16:14:17,554 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 22 [2019-09-16 16:14:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:17,554 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2019-09-16 16:14:17,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 16:14:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2019-09-16 16:14:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-16 16:14:17,556 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:17,556 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] [2019-09-16 16:14:17,556 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1675538566, now seen corresponding path program 1 times [2019-09-16 16:14:17,557 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:17,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:17,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:17,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:17,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:17,760 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 16:14:17,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:17,762 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 16:14:17,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:17,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-16 16:14:17,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:17,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:17,912 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 16:14:17,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:17,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-09-16 16:14:17,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 16:14:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 16:14:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:14:17,919 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 8 states. [2019-09-16 16:14:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:18,128 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2019-09-16 16:14:18,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:14:18,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-09-16 16:14:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:18,132 INFO L225 Difference]: With dead ends: 93 [2019-09-16 16:14:18,132 INFO L226 Difference]: Without dead ends: 66 [2019-09-16 16:14:18,133 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 3 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 16:14:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-16 16:14:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2019-09-16 16:14:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-16 16:14:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-09-16 16:14:18,158 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 26 [2019-09-16 16:14:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:18,159 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-09-16 16:14:18,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 16:14:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-09-16 16:14:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-16 16:14:18,160 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:18,160 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] [2019-09-16 16:14:18,161 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:18,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1636442583, now seen corresponding path program 1 times [2019-09-16 16:14:18,161 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:18,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:18,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:18,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:18,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-16 16:14:18,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:18,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:14:18,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:14:18,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:14:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:14:18,243 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 3 states. [2019-09-16 16:14:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:18,266 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-09-16 16:14:18,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:14:18,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-09-16 16:14:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:18,268 INFO L225 Difference]: With dead ends: 69 [2019-09-16 16:14:18,268 INFO L226 Difference]: Without dead ends: 48 [2019-09-16 16:14:18,269 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 16:14:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-16 16:14:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-16 16:14:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-16 16:14:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-09-16 16:14:18,277 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2019-09-16 16:14:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:18,277 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-09-16 16:14:18,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:14:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-09-16 16:14:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-16 16:14:18,279 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:18,279 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] [2019-09-16 16:14:18,279 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash -935378005, now seen corresponding path program 1 times [2019-09-16 16:14:18,280 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:18,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:18,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:18,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:18,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:19,269 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-09-16 16:14:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:19,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:19,784 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) [2019-09-16 16:14:19,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:19,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-16 16:14:19,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:19,943 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 16:14:19,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:14:19,957 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:14:19,958 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 16:14:19,959 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-09-16 16:14:20,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:20,195 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 16:14:20,201 INFO L168 Benchmark]: Toolchain (without parser) took 4548.18 ms. Allocated memory was 134.2 MB in the beginning and 259.5 MB in the end (delta: 125.3 MB). Free memory was 90.0 MB in the beginning and 228.9 MB in the end (delta: -139.0 MB). Peak memory consumption was 133.6 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:20,202 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 16:14:20,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.56 ms. Allocated memory was 134.2 MB in the beginning and 197.1 MB in the end (delta: 62.9 MB). Free memory was 89.7 MB in the beginning and 172.6 MB in the end (delta: -82.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:20,204 INFO L168 Benchmark]: Boogie Preprocessor took 47.80 ms. Allocated memory is still 197.1 MB. Free memory was 172.6 MB in the beginning and 170.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:20,205 INFO L168 Benchmark]: RCFGBuilder took 473.97 ms. Allocated memory is still 197.1 MB. Free memory was 170.3 MB in the beginning and 148.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:20,206 INFO L168 Benchmark]: TraceAbstraction took 3636.51 ms. Allocated memory was 197.1 MB in the beginning and 259.5 MB in the end (delta: 62.4 MB). Free memory was 148.3 MB in the beginning and 228.9 MB in the end (delta: -80.6 MB). Peak memory consumption was 129.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:14:20,210 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 385.56 ms. Allocated memory was 134.2 MB in the beginning and 197.1 MB in the end (delta: 62.9 MB). Free memory was 89.7 MB in the beginning and 172.6 MB in the end (delta: -82.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.80 ms. Allocated memory is still 197.1 MB. Free memory was 172.6 MB in the beginning and 170.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.97 ms. Allocated memory is still 197.1 MB. Free memory was 170.3 MB in the beginning and 148.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3636.51 ms. Allocated memory was 197.1 MB in the beginning and 259.5 MB in the end (delta: 62.4 MB). Free memory was 148.3 MB in the beginning and 228.9 MB in the end (delta: -80.6 MB). Peak memory consumption was 129.0 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...